Memory barriers are needed also by Xen and, when the ioeventfd bugs are fixed, by TCG as well. sysemu/kvm.h is not anymore needed in sysemu/dma.h, move it to the actual users. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
337 lines
9.1 KiB
C
337 lines
9.1 KiB
C
/*
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* QEMU PCI test device
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*
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* Copyright (c) 2012 Red Hat Inc.
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* Author: Michael S. Tsirkin <mst@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "hw/hw.h"
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#include "hw/pci/pci.h"
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#include "qemu/event_notifier.h"
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#include "sysemu/kvm.h"
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typedef struct PCITestDevHdr {
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uint8_t test;
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uint8_t width;
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uint8_t pad0[2];
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uint32_t offset;
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uint8_t data;
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uint8_t pad1[3];
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uint32_t count;
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uint8_t name[];
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} PCITestDevHdr;
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typedef struct IOTest {
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MemoryRegion *mr;
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EventNotifier notifier;
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bool hasnotifier;
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unsigned size;
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bool match_data;
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PCITestDevHdr *hdr;
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unsigned bufsize;
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} IOTest;
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#define IOTEST_DATAMATCH 0xFA
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#define IOTEST_NOMATCH 0xCE
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#define IOTEST_IOSIZE 128
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#define IOTEST_MEMSIZE 2048
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static const char *iotest_test[] = {
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"no-eventfd",
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"wildcard-eventfd",
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"datamatch-eventfd"
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};
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static const char *iotest_type[] = {
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"mmio",
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"portio"
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};
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#define IOTEST_TEST(i) (iotest_test[((i) % ARRAY_SIZE(iotest_test))])
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#define IOTEST_TYPE(i) (iotest_type[((i) / ARRAY_SIZE(iotest_test))])
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#define IOTEST_MAX_TEST (ARRAY_SIZE(iotest_test))
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#define IOTEST_MAX_TYPE (ARRAY_SIZE(iotest_type))
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#define IOTEST_MAX (IOTEST_MAX_TEST * IOTEST_MAX_TYPE)
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enum {
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IOTEST_ACCESS_NAME,
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IOTEST_ACCESS_DATA,
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IOTEST_ACCESS_MAX,
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};
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#define IOTEST_ACCESS_TYPE uint8_t
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#define IOTEST_ACCESS_WIDTH (sizeof(uint8_t))
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typedef struct PCITestDevState {
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/*< private >*/
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PCIDevice parent_obj;
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/*< public >*/
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MemoryRegion mmio;
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MemoryRegion portio;
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IOTest *tests;
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int current;
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} PCITestDevState;
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#define TYPE_PCI_TEST_DEV "pci-testdev"
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#define PCI_TEST_DEV(obj) \
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OBJECT_CHECK(PCITestDevState, (obj), TYPE_PCI_TEST_DEV)
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#define IOTEST_IS_MEM(i) (strcmp(IOTEST_TYPE(i), "portio"))
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#define IOTEST_REGION(d, i) (IOTEST_IS_MEM(i) ? &(d)->mmio : &(d)->portio)
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#define IOTEST_SIZE(i) (IOTEST_IS_MEM(i) ? IOTEST_MEMSIZE : IOTEST_IOSIZE)
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#define IOTEST_PCI_BAR(i) (IOTEST_IS_MEM(i) ? PCI_BASE_ADDRESS_SPACE_MEMORY : \
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PCI_BASE_ADDRESS_SPACE_IO)
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static int pci_testdev_start(IOTest *test)
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{
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test->hdr->count = 0;
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if (!test->hasnotifier) {
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return 0;
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}
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event_notifier_test_and_clear(&test->notifier);
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memory_region_add_eventfd(test->mr,
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le32_to_cpu(test->hdr->offset),
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test->size,
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test->match_data,
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test->hdr->data,
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&test->notifier);
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return 0;
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}
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static void pci_testdev_stop(IOTest *test)
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{
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if (!test->hasnotifier) {
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return;
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}
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memory_region_del_eventfd(test->mr,
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le32_to_cpu(test->hdr->offset),
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test->size,
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test->match_data,
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test->hdr->data,
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&test->notifier);
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}
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static void
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pci_testdev_reset(PCITestDevState *d)
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{
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if (d->current == -1) {
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return;
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}
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pci_testdev_stop(&d->tests[d->current]);
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d->current = -1;
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}
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static void pci_testdev_inc(IOTest *test, unsigned inc)
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{
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uint32_t c = le32_to_cpu(test->hdr->count);
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test->hdr->count = cpu_to_le32(c + inc);
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}
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static void
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pci_testdev_write(void *opaque, hwaddr addr, uint64_t val,
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unsigned size, int type)
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{
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PCITestDevState *d = opaque;
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IOTest *test;
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int t, r;
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if (addr == offsetof(PCITestDevHdr, test)) {
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pci_testdev_reset(d);
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if (val >= IOTEST_MAX_TEST) {
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return;
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}
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t = type * IOTEST_MAX_TEST + val;
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r = pci_testdev_start(&d->tests[t]);
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if (r < 0) {
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return;
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}
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d->current = t;
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return;
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}
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if (d->current < 0) {
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return;
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}
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test = &d->tests[d->current];
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if (addr != le32_to_cpu(test->hdr->offset)) {
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return;
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}
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if (test->match_data && test->size != size) {
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return;
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}
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if (test->match_data && val != test->hdr->data) {
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return;
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}
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pci_testdev_inc(test, 1);
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}
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static uint64_t
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pci_testdev_read(void *opaque, hwaddr addr, unsigned size)
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{
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PCITestDevState *d = opaque;
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const char *buf;
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IOTest *test;
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if (d->current < 0) {
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return 0;
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}
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test = &d->tests[d->current];
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buf = (const char *)test->hdr;
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if (addr + size >= test->bufsize) {
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return 0;
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}
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if (test->hasnotifier) {
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event_notifier_test_and_clear(&test->notifier);
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}
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return buf[addr];
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}
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static void
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pci_testdev_mmio_write(void *opaque, hwaddr addr, uint64_t val,
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unsigned size)
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{
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pci_testdev_write(opaque, addr, val, size, 0);
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}
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static void
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pci_testdev_pio_write(void *opaque, hwaddr addr, uint64_t val,
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unsigned size)
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{
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pci_testdev_write(opaque, addr, val, size, 1);
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}
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static const MemoryRegionOps pci_testdev_mmio_ops = {
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.read = pci_testdev_read,
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.write = pci_testdev_mmio_write,
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.endianness = DEVICE_LITTLE_ENDIAN,
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.impl = {
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.min_access_size = 1,
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.max_access_size = 1,
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},
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};
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static const MemoryRegionOps pci_testdev_pio_ops = {
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.read = pci_testdev_read,
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.write = pci_testdev_pio_write,
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.endianness = DEVICE_LITTLE_ENDIAN,
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.impl = {
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.min_access_size = 1,
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.max_access_size = 1,
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},
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};
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static void pci_testdev_realize(PCIDevice *pci_dev, Error **errp)
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{
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PCITestDevState *d = PCI_TEST_DEV(pci_dev);
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uint8_t *pci_conf;
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char *name;
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int r, i;
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bool fastmmio = kvm_ioeventfd_any_length_enabled();
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pci_conf = pci_dev->config;
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pci_conf[PCI_INTERRUPT_PIN] = 0; /* no interrupt pin */
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memory_region_init_io(&d->mmio, OBJECT(d), &pci_testdev_mmio_ops, d,
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"pci-testdev-mmio", IOTEST_MEMSIZE * 2);
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memory_region_init_io(&d->portio, OBJECT(d), &pci_testdev_pio_ops, d,
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"pci-testdev-portio", IOTEST_IOSIZE * 2);
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pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
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pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->portio);
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d->current = -1;
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d->tests = g_malloc0(IOTEST_MAX * sizeof *d->tests);
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for (i = 0; i < IOTEST_MAX; ++i) {
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IOTest *test = &d->tests[i];
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name = g_strdup_printf("%s-%s", IOTEST_TYPE(i), IOTEST_TEST(i));
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test->bufsize = sizeof(PCITestDevHdr) + strlen(name) + 1;
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test->hdr = g_malloc0(test->bufsize);
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memcpy(test->hdr->name, name, strlen(name) + 1);
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g_free(name);
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test->hdr->offset = cpu_to_le32(IOTEST_SIZE(i) + i * IOTEST_ACCESS_WIDTH);
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test->match_data = strcmp(IOTEST_TEST(i), "wildcard-eventfd");
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if (fastmmio && IOTEST_IS_MEM(i) && !test->match_data) {
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test->size = 0;
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} else {
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test->size = IOTEST_ACCESS_WIDTH;
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}
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test->hdr->test = i;
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test->hdr->data = test->match_data ? IOTEST_DATAMATCH : IOTEST_NOMATCH;
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test->hdr->width = IOTEST_ACCESS_WIDTH;
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test->mr = IOTEST_REGION(d, i);
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if (!strcmp(IOTEST_TEST(i), "no-eventfd")) {
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test->hasnotifier = false;
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continue;
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}
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r = event_notifier_init(&test->notifier, 0);
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assert(r >= 0);
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test->hasnotifier = true;
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}
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}
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static void
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pci_testdev_uninit(PCIDevice *dev)
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{
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PCITestDevState *d = PCI_TEST_DEV(dev);
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int i;
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pci_testdev_reset(d);
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for (i = 0; i < IOTEST_MAX; ++i) {
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if (d->tests[i].hasnotifier) {
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event_notifier_cleanup(&d->tests[i].notifier);
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}
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g_free(d->tests[i].hdr);
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}
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g_free(d->tests);
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}
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static void qdev_pci_testdev_reset(DeviceState *dev)
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{
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PCITestDevState *d = PCI_TEST_DEV(dev);
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pci_testdev_reset(d);
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}
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static void pci_testdev_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
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k->realize = pci_testdev_realize;
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k->exit = pci_testdev_uninit;
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k->vendor_id = PCI_VENDOR_ID_REDHAT;
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k->device_id = PCI_DEVICE_ID_REDHAT_TEST;
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k->revision = 0x00;
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k->class_id = PCI_CLASS_OTHERS;
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dc->desc = "PCI Test Device";
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set_bit(DEVICE_CATEGORY_MISC, dc->categories);
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dc->reset = qdev_pci_testdev_reset;
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}
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static const TypeInfo pci_testdev_info = {
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.name = TYPE_PCI_TEST_DEV,
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.parent = TYPE_PCI_DEVICE,
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.instance_size = sizeof(PCITestDevState),
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.class_init = pci_testdev_class_init,
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};
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static void pci_testdev_register_types(void)
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{
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type_register_static(&pci_testdev_info);
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}
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type_init(pci_testdev_register_types)
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