megasas: Add MSI support
Some hardware instances do support MSI, so we should do likewise.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index c40e48b..baee46f 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -21,6 +21,7 @@
#include "hw/hw.h"
#include "hw/pci/pci.h"
#include "sysemu/dma.h"
+#include "hw/pci/msi.h"
#include "hw/pci/msix.h"
#include "qemu/iov.h"
#include "hw/scsi/scsi.h"
@@ -43,9 +44,11 @@
#define MEGASAS_FLAG_USE_JBOD 0
#define MEGASAS_MASK_USE_JBOD (1 << MEGASAS_FLAG_USE_JBOD)
-#define MEGASAS_FLAG_USE_MSIX 1
+#define MEGASAS_FLAG_USE_MSI 1
+#define MEGASAS_MASK_USE_MSI (1 << MEGASAS_FLAG_USE_MSI)
+#define MEGASAS_FLAG_USE_MSIX 2
#define MEGASAS_MASK_USE_MSIX (1 << MEGASAS_FLAG_USE_MSIX)
-#define MEGASAS_FLAG_USE_QUEUE64 2
+#define MEGASAS_FLAG_USE_QUEUE64 3
#define MEGASAS_MASK_USE_QUEUE64 (1 << MEGASAS_FLAG_USE_QUEUE64)
static const char *mfi_frame_desc[] = {
@@ -132,6 +135,11 @@
return s->flags & MEGASAS_MASK_USE_QUEUE64;
}
+static bool megasas_use_msi(MegasasState *s)
+{
+ return s->flags & MEGASAS_MASK_USE_MSI;
+}
+
static bool megasas_use_msix(MegasasState *s)
{
return s->flags & MEGASAS_MASK_USE_MSIX;
@@ -538,6 +546,9 @@
if (msix_enabled(pci_dev)) {
trace_megasas_msix_raise(0);
msix_notify(pci_dev, 0);
+ } else if (msi_enabled(pci_dev)) {
+ trace_megasas_msi_raise(0);
+ msi_notify(pci_dev, 0);
} else {
trace_megasas_irq_raise();
pci_irq_assert(pci_dev);
@@ -1956,12 +1967,20 @@
break;
case MFI_OMSK:
s->intr_mask = val;
- if (!megasas_intr_enabled(s) && !msix_enabled(pci_dev)) {
+ if (!megasas_intr_enabled(s) &&
+ !msi_enabled(pci_dev) &&
+ !msix_enabled(pci_dev)) {
trace_megasas_irq_lower();
pci_irq_deassert(pci_dev);
}
if (megasas_intr_enabled(s)) {
- trace_megasas_intr_enabled();
+ if (msix_enabled(pci_dev)) {
+ trace_megasas_msix_enabled(0);
+ } else if (msi_enabled(pci_dev)) {
+ trace_megasas_msi_enabled(0);
+ } else {
+ trace_megasas_intr_enabled();
+ }
} else {
trace_megasas_intr_disabled();
}
@@ -2101,7 +2120,12 @@
{
MegasasState *s = MEGASAS(d);
- msix_uninit(d, &s->mmio_io, &s->mmio_io);
+ if (megasas_use_msix(s)) {
+ msix_uninit(d, &s->mmio_io, &s->mmio_io);
+ }
+ if (megasas_use_msi(s)) {
+ msi_uninit(d);
+ }
memory_region_destroy(&s->mmio_io);
memory_region_destroy(&s->port_io);
memory_region_destroy(&s->queue_io);
@@ -2140,6 +2164,10 @@
memory_region_init_io(&s->queue_io, OBJECT(s), &megasas_queue_ops, s,
"megasas-queue", 0x40000);
+ if (megasas_use_msi(s) &&
+ msi_init(dev, 0x50, 1, true, false)) {
+ s->flags &= ~MEGASAS_MASK_USE_MSI;
+ }
if (megasas_use_msix(s) &&
msix_init(dev, 15, &s->mmio_io, 0, 0x2000,
&s->mmio_io, 0, 0x3800, 0x68)) {
@@ -2176,7 +2204,6 @@
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;
@@ -2201,6 +2228,13 @@
return 0;
}
+static void
+megasas_write_config(PCIDevice *pci, uint32_t addr, uint32_t val, int len)
+{
+ pci_default_write_config(pci, addr, val, len);
+ msi_write_config(pci, addr, val, len);
+}
+
static Property megasas_properties[] = {
DEFINE_PROP_UINT32("max_sge", MegasasState, fw_sge,
MEGASAS_DEFAULT_SGE),
@@ -2208,6 +2242,8 @@
MEGASAS_DEFAULT_FRAMES),
DEFINE_PROP_STRING("hba_serial", MegasasState, hba_serial),
DEFINE_PROP_UINT64("sas_address", MegasasState, sas_addr, 0),
+ DEFINE_PROP_BIT("use_msi", MegasasState, flags,
+ MEGASAS_FLAG_USE_MSI, false),
DEFINE_PROP_BIT("use_msix", MegasasState, flags,
MEGASAS_FLAG_USE_MSIX, false),
DEFINE_PROP_BIT("use_jbod", MegasasState, flags,
@@ -2232,6 +2268,7 @@
dc->vmsd = &vmstate_megasas;
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
dc->desc = "LSI MegaRAID SAS 1078";
+ pc->config_write = megasas_write_config;
}
static const TypeInfo megasas_info = {
