* Copyright (c) 2006 Igor Kovalenko
*
* This code is licensed under the GNU GPL v2.
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
*/
#include "hw.h"
#include "pc.h"
#include "pci.h"
#include "msix.h"
#include "kvm.h"
+#include "migration.h"
+#include "qerror.h"
+#include "event_notifier.h"
#include <sys/mman.h>
#include <sys/types.h>
typedef struct Peer {
int nb_eventfds;
- int *eventfds;
+ EventNotifier *eventfds;
} Peer;
typedef struct EventfdEntry {
CharDriverState *server_chr;
MemoryRegion ivshmem_mmio;
- pcibus_t mmio_addr;
/* We might need to register the BAR before we actually have the memory.
* So prepare a container MemoryRegion for the BAR immediately and
* add a subregion when we have the memory.
*/
MemoryRegion bar;
MemoryRegion ivshmem;
- MemoryRegion msix_bar;
uint64_t ivshmem_size; /* size of shared memory region */
+ uint32_t ivshmem_attr;
+ uint32_t ivshmem_64bit;
int shm_fd; /* shared memory file descriptor */
Peer *peers;
uint32_t features;
EventfdEntry *eventfd_table;
+ Error *migration_blocker;
+
char * shmobj;
char * sizearg;
char * role;
s->intrstatus = val;
ivshmem_update_irq(s, val);
- return;
}
static uint32_t ivshmem_IntrStatus_read(IVShmemState *s)
return ret;
}
-static void ivshmem_io_write(void *opaque, target_phys_addr_t addr,
+static void ivshmem_io_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
IVShmemState *s = opaque;
- uint64_t write_one = 1;
uint16_t dest = val >> 16;
uint16_t vector = val & 0xff;
/* check doorbell range */
if (vector < s->peers[dest].nb_eventfds) {
- IVSHMEM_DPRINTF("Writing %" PRId64 " to VM %d on vector %d\n",
- write_one, dest, vector);
- if (write(s->peers[dest].eventfds[vector],
- &(write_one), 8) != 8) {
- IVSHMEM_DPRINTF("error writing to eventfd\n");
- }
+ IVSHMEM_DPRINTF("Notifying VM %d on vector %d\n", dest, vector);
+ event_notifier_set(&s->peers[dest].eventfds[vector]);
}
break;
default:
}
}
-static uint64_t ivshmem_io_read(void *opaque, target_phys_addr_t addr,
+static uint64_t ivshmem_io_read(void *opaque, hwaddr addr,
unsigned size)
{
msix_notify(pdev, entry->vector);
}
-static CharDriverState* create_eventfd_chr_device(void * opaque, int eventfd,
- int vector)
+static CharDriverState* create_eventfd_chr_device(void * opaque, EventNotifier *n,
+ int vector)
{
/* create a event character device based on the passed eventfd */
IVShmemState *s = opaque;
CharDriverState * chr;
+ int eventfd = event_notifier_get_fd(n);
chr = qemu_chr_open_eventfd(eventfd);
ptr = mmap(0, s->ivshmem_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
- memory_region_init_ram_ptr(&s->ivshmem, &s->dev.qdev, "ivshmem.bar2",
+ memory_region_init_ram_ptr(&s->ivshmem, "ivshmem.bar2",
s->ivshmem_size, ptr);
+ vmstate_register_ram(&s->ivshmem, &s->dev.qdev);
memory_region_add_subregion(&s->bar, 0, &s->ivshmem);
/* region for shared memory */
- pci_register_bar(&s->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar);
+ pci_register_bar(&s->dev, 2, s->ivshmem_attr, &s->bar);
+}
+
+static void ivshmem_add_eventfd(IVShmemState *s, int posn, int i)
+{
+ memory_region_add_eventfd(&s->ivshmem_mmio,
+ DOORBELL,
+ 4,
+ true,
+ (posn << 16) | i,
+ &s->peers[posn].eventfds[i]);
+}
+
+static void ivshmem_del_eventfd(IVShmemState *s, int posn, int i)
+{
+ memory_region_del_eventfd(&s->ivshmem_mmio,
+ DOORBELL,
+ 4,
+ true,
+ (posn << 16) | i,
+ &s->peers[posn].eventfds[i]);
}
static void close_guest_eventfds(IVShmemState *s, int posn)
{
int i, guest_curr_max;
+ if (!ivshmem_has_feature(s, IVSHMEM_IOEVENTFD)) {
+ return;
+ }
+
guest_curr_max = s->peers[posn].nb_eventfds;
+ memory_region_transaction_begin();
for (i = 0; i < guest_curr_max; i++) {
- kvm_set_ioeventfd_mmio_long(s->peers[posn].eventfds[i],
- s->mmio_addr + DOORBELL, (posn << 16) | i, 0);
- close(s->peers[posn].eventfds[i]);
+ ivshmem_del_eventfd(s, posn, i);
+ }
+ memory_region_transaction_commit();
+ for (i = 0; i < guest_curr_max; i++) {
+ event_notifier_cleanup(&s->peers[posn].eventfds[i]);
}
- qemu_free(s->peers[posn].eventfds);
+ g_free(s->peers[posn].eventfds);
s->peers[posn].nb_eventfds = 0;
}
-static void setup_ioeventfds(IVShmemState *s) {
-
- int i, j;
-
- for (i = 0; i <= s->max_peer; i++) {
- for (j = 0; j < s->peers[i].nb_eventfds; j++) {
- memory_region_add_eventfd(&s->ivshmem_mmio,
- DOORBELL,
- 4,
- true,
- (i << 16) | j,
- s->peers[i].eventfds[j]);
- }
- }
-}
-
/* this function increase the dynamic storage need to store data about other
* guests */
static void increase_dynamic_storage(IVShmemState *s, int new_min_size) {
s->nb_peers = s->nb_peers * 2;
IVSHMEM_DPRINTF("bumping storage to %d guests\n", s->nb_peers);
- s->peers = qemu_realloc(s->peers, s->nb_peers * sizeof(Peer));
+ s->peers = g_realloc(s->peers, s->nb_peers * sizeof(Peer));
/* zero out new pointers */
for (j = old_nb_alloc; j < s->nb_peers; j++) {
memcpy(&incoming_posn, buf, sizeof(long));
/* pick off s->server_chr->msgfd and store it, posn should accompany msg */
- tmp_fd = qemu_chr_get_msgfd(s->server_chr);
+ tmp_fd = qemu_chr_fe_get_msgfd(s->server_chr);
IVSHMEM_DPRINTF("posn is %ld, fd is %d\n", incoming_posn, tmp_fd);
/* make sure we have enough space for this guest */
/* mmap the region and map into the BAR2 */
map_ptr = mmap(0, s->ivshmem_size, PROT_READ|PROT_WRITE, MAP_SHARED,
incoming_fd, 0);
- memory_region_init_ram_ptr(&s->ivshmem, &s->dev.qdev,
+ memory_region_init_ram_ptr(&s->ivshmem,
"ivshmem.bar2", s->ivshmem_size, map_ptr);
+ vmstate_register_ram(&s->ivshmem, &s->dev.qdev);
IVSHMEM_DPRINTF("guest h/w addr = %" PRIu64 ", size = %" PRIu64 "\n",
s->ivshmem_offset, s->ivshmem_size);
if (guest_max_eventfd == 0) {
/* one eventfd per MSI vector */
- s->peers[incoming_posn].eventfds = (int *) qemu_malloc(s->vectors *
- sizeof(int));
+ s->peers[incoming_posn].eventfds = g_new(EventNotifier, s->vectors);
}
/* this is an eventfd for a particular guest VM */
IVSHMEM_DPRINTF("eventfds[%ld][%d] = %d\n", incoming_posn,
guest_max_eventfd, incoming_fd);
- s->peers[incoming_posn].eventfds[guest_max_eventfd] = incoming_fd;
+ event_notifier_init_fd(&s->peers[incoming_posn].eventfds[guest_max_eventfd],
+ incoming_fd);
/* increment count for particular guest */
s->peers[incoming_posn].nb_eventfds++;
if (incoming_posn == s->vm_id) {
s->eventfd_chr[guest_max_eventfd] = create_eventfd_chr_device(s,
- s->peers[s->vm_id].eventfds[guest_max_eventfd],
+ &s->peers[s->vm_id].eventfds[guest_max_eventfd],
guest_max_eventfd);
}
if (ivshmem_has_feature(s, IVSHMEM_IOEVENTFD)) {
- if (kvm_set_ioeventfd_mmio_long(incoming_fd, s->mmio_addr + DOORBELL,
- (incoming_posn << 16) | guest_max_eventfd, 1) < 0) {
- fprintf(stderr, "ivshmem: ioeventfd not available\n");
- }
+ ivshmem_add_eventfd(s, incoming_posn, guest_max_eventfd);
+ }
+}
+
+/* Select the MSI-X vectors used by device.
+ * ivshmem maps events to vectors statically, so
+ * we just enable all vectors on init and after reset. */
+static void ivshmem_use_msix(IVShmemState * s)
+{
+ int i;
+
+ if (!msix_present(&s->dev)) {
+ return;
}
- return;
+ for (i = 0; i < s->vectors; i++) {
+ msix_vector_use(&s->dev, i);
+ }
}
static void ivshmem_reset(DeviceState *d)
IVShmemState *s = DO_UPCAST(IVShmemState, dev.qdev, d);
s->intrstatus = 0;
- return;
+ ivshmem_use_msix(s);
}
static uint64_t ivshmem_get_size(IVShmemState * s) {
return value;
}
-static void ivshmem_setup_msi(IVShmemState * s) {
-
- int i;
-
- /* allocate the MSI-X vectors */
-
- memory_region_init(&s->msix_bar, "ivshmem-msix", 4096);
- if (!msix_init(&s->dev, s->vectors, &s->msix_bar, 1, 0)) {
- pci_register_bar(&s->dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY,
- &s->msix_bar);
- IVSHMEM_DPRINTF("msix initialized (%d vectors)\n", s->vectors);
- } else {
+static void ivshmem_setup_msi(IVShmemState * s)
+{
+ if (msix_init_exclusive_bar(&s->dev, s->vectors, 1)) {
IVSHMEM_DPRINTF("msix initialization failed\n");
exit(1);
}
- /* 'activate' the vectors */
- for (i = 0; i < s->vectors; i++) {
- msix_vector_use(&s->dev, i);
- }
+ IVSHMEM_DPRINTF("msix initialized (%d vectors)\n", s->vectors);
+
+ /* allocate QEMU char devices for receiving interrupts */
+ s->eventfd_table = g_malloc0(s->vectors * sizeof(EventfdEntry));
- /* allocate Qemu char devices for receiving interrupts */
- s->eventfd_table = qemu_mallocz(s->vectors * sizeof(EventfdEntry));
+ ivshmem_use_msix(s);
}
static void ivshmem_save(QEMUFile* f, void *opaque)
IVSHMEM_DPRINTF("ivshmem_load\n");
IVShmemState *proxy = opaque;
- int ret, i;
+ int ret;
if (version_id > 0) {
return -EINVAL;
if (ivshmem_has_feature(proxy, IVSHMEM_MSI)) {
msix_load(&proxy->dev, f);
- for (i = 0; i < proxy->vectors; i++) {
- msix_vector_use(&proxy->dev, i);
- }
+ ivshmem_use_msix(proxy);
} else {
proxy->intrstatus = qemu_get_be32(f);
proxy->intrmask = qemu_get_be32(f);
return 0;
}
+static void ivshmem_write_config(PCIDevice *pci_dev, uint32_t address,
+ uint32_t val, int len)
+{
+ pci_default_write_config(pci_dev, address, val, len);
+ msix_write_config(pci_dev, address, val, len);
+}
+
static int pci_ivshmem_init(PCIDevice *dev)
{
IVShmemState *s = DO_UPCAST(IVShmemState, dev, dev);
}
if (s->role_val == IVSHMEM_PEER) {
- register_device_unmigratable(&s->dev.qdev, "ivshmem", s);
+ error_set(&s->migration_blocker, QERR_DEVICE_FEATURE_BLOCKS_MIGRATION,
+ "peer mode", "ivshmem");
+ migrate_add_blocker(s->migration_blocker);
}
pci_conf = s->dev.config;
memory_region_init_io(&s->ivshmem_mmio, &ivshmem_mmio_ops, s,
"ivshmem-mmio", IVSHMEM_REG_BAR_SIZE);
- if (ivshmem_has_feature(s, IVSHMEM_IOEVENTFD)) {
- setup_ioeventfds(s);
- }
-
/* region for registers*/
pci_register_bar(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY,
&s->ivshmem_mmio);
memory_region_init(&s->bar, "ivshmem-bar2-container", s->ivshmem_size);
+ s->ivshmem_attr = PCI_BASE_ADDRESS_SPACE_MEMORY |
+ PCI_BASE_ADDRESS_MEM_PREFETCH;
+ if (s->ivshmem_64bit) {
+ s->ivshmem_attr |= PCI_BASE_ADDRESS_MEM_TYPE_64;
+ }
if ((s->server_chr != NULL) &&
(strncmp(s->server_chr->filename, "unix:", 5) == 0)) {
s->vm_id = -1;
/* allocate/initialize space for interrupt handling */
- s->peers = qemu_mallocz(s->nb_peers * sizeof(Peer));
+ s->peers = g_malloc0(s->nb_peers * sizeof(Peer));
- pci_register_bar(&s->dev, 2,
- PCI_BASE_ADDRESS_SPACE_MEMORY, &s->ivshmem);
+ pci_register_bar(&s->dev, 2, s->ivshmem_attr, &s->bar);
- s->eventfd_chr = qemu_mallocz(s->vectors * sizeof(CharDriverState *));
+ s->eventfd_chr = g_malloc0(s->vectors * sizeof(CharDriverState *));
qemu_chr_add_handlers(s->server_chr, ivshmem_can_receive, ivshmem_read,
ivshmem_event, s);
}
+ s->dev.config_write = ivshmem_write_config;
+
return 0;
}
-static int pci_ivshmem_uninit(PCIDevice *dev)
+static void pci_ivshmem_uninit(PCIDevice *dev)
{
IVShmemState *s = DO_UPCAST(IVShmemState, dev, dev);
+ if (s->migration_blocker) {
+ migrate_del_blocker(s->migration_blocker);
+ error_free(s->migration_blocker);
+ }
+
memory_region_destroy(&s->ivshmem_mmio);
memory_region_del_subregion(&s->bar, &s->ivshmem);
+ vmstate_unregister_ram(&s->ivshmem, &s->dev.qdev);
memory_region_destroy(&s->ivshmem);
memory_region_destroy(&s->bar);
unregister_savevm(&dev->qdev, "ivshmem", s);
+}
- return 0;
+static Property ivshmem_properties[] = {
+ DEFINE_PROP_CHR("chardev", IVShmemState, server_chr),
+ DEFINE_PROP_STRING("size", IVShmemState, sizearg),
+ DEFINE_PROP_UINT32("vectors", IVShmemState, vectors, 1),
+ DEFINE_PROP_BIT("ioeventfd", IVShmemState, features, IVSHMEM_IOEVENTFD, false),
+ DEFINE_PROP_BIT("msi", IVShmemState, features, IVSHMEM_MSI, true),
+ DEFINE_PROP_STRING("shm", IVShmemState, shmobj),
+ DEFINE_PROP_STRING("role", IVShmemState, role),
+ DEFINE_PROP_UINT32("use64", IVShmemState, ivshmem_64bit, 1),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void ivshmem_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+ k->init = pci_ivshmem_init;
+ k->exit = pci_ivshmem_uninit;
+ k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+ k->device_id = 0x1110;
+ k->class_id = PCI_CLASS_MEMORY_RAM;
+ dc->reset = ivshmem_reset;
+ dc->props = ivshmem_properties;
}
-static PCIDeviceInfo ivshmem_info = {
- .qdev.name = "ivshmem",
- .qdev.size = sizeof(IVShmemState),
- .qdev.reset = ivshmem_reset,
- .init = pci_ivshmem_init,
- .exit = pci_ivshmem_uninit,
- .vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET,
- .device_id = 0x1110,
- .class_id = PCI_CLASS_MEMORY_RAM,
- .qdev.props = (Property[]) {
- DEFINE_PROP_CHR("chardev", IVShmemState, server_chr),
- DEFINE_PROP_STRING("size", IVShmemState, sizearg),
- DEFINE_PROP_UINT32("vectors", IVShmemState, vectors, 1),
- DEFINE_PROP_BIT("ioeventfd", IVShmemState, features, IVSHMEM_IOEVENTFD, false),
- DEFINE_PROP_BIT("msi", IVShmemState, features, IVSHMEM_MSI, true),
- DEFINE_PROP_STRING("shm", IVShmemState, shmobj),
- DEFINE_PROP_STRING("role", IVShmemState, role),
- DEFINE_PROP_END_OF_LIST(),
- }
+static TypeInfo ivshmem_info = {
+ .name = "ivshmem",
+ .parent = TYPE_PCI_DEVICE,
+ .instance_size = sizeof(IVShmemState),
+ .class_init = ivshmem_class_init,
};
-static void ivshmem_register_devices(void)
+static void ivshmem_register_types(void)
{
- pci_qdev_register(&ivshmem_info);
+ type_register_static(&ivshmem_info);
}
-device_init(ivshmem_register_devices)
+type_init(ivshmem_register_types)
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