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qemu-e2k/tests/qtest/ide-test.c
Alexander Popov 59805ae92d tests/ide-test: Create a single unit-test covering more PRDT cases 
Fuzzing the Linux kernel with syzkaller allowed to find how to crash qemu
using a special SCSI_IOCTL_SEND_COMMAND. It hits the assertion in
ide_dma_cb() introduced in the commit a718978ed5 in July 2015.
Currently this bug is not reproduced by the unit tests.

Let's improve the ide-test to cover more PRDT cases including one
that causes this particular qemu crash.

The test is developed according to the Programming Interface for
Bus Master IDE Controller (Revision 1.0 5/16/94).

Signed-off-by: Alexander Popov <alex.popov@linux.com>
Message-id: 20191223175117.508990-3-alex.popov@linux.com
Signed-off-by: John Snow <jsnow@redhat.com>
2020-01-27 17:07:31 -05:00

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/*
* IDE test cases
*
* Copyright (c) 2013 Kevin Wolf <kwolf@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "libqtest.h"
#include "libqos/libqos.h"
#include "libqos/pci-pc.h"
#include "libqos/malloc-pc.h"
#include "qapi/qmp/qdict.h"
#include "qemu-common.h"
#include "qemu/bswap.h"
#include "hw/pci/pci_ids.h"
#include "hw/pci/pci_regs.h"
/* TODO actually test the results and get rid of this */
#define qmp_discard_response(q, ...) qobject_unref(qtest_qmp(q, __VA_ARGS__))
#define TEST_IMAGE_SIZE 64 * 1024 * 1024
#define IDE_PCI_DEV 1
#define IDE_PCI_FUNC 1
#define IDE_BASE 0x1f0
#define IDE_PRIMARY_IRQ 14
#define ATAPI_BLOCK_SIZE 2048
/* How many bytes to receive via ATAPI PIO at one time.
* Must be less than 0xFFFF. */
#define BYTE_COUNT_LIMIT 5120
enum {
reg_data = 0x0,
reg_feature = 0x1,
reg_error = 0x1,
reg_nsectors = 0x2,
reg_lba_low = 0x3,
reg_lba_middle = 0x4,
reg_lba_high = 0x5,
reg_device = 0x6,
reg_status = 0x7,
reg_command = 0x7,
};
enum {
BSY = 0x80,
DRDY = 0x40,
DF = 0x20,
DRQ = 0x08,
ERR = 0x01,
};
/* Error field */
enum {
ABRT = 0x04,
};
enum {
DEV = 0x10,
LBA = 0x40,
};
enum {
bmreg_cmd = 0x0,
bmreg_status = 0x2,
bmreg_prdt = 0x4,
};
enum {
CMD_DSM = 0x06,
CMD_READ_DMA = 0xc8,
CMD_WRITE_DMA = 0xca,
CMD_FLUSH_CACHE = 0xe7,
CMD_IDENTIFY = 0xec,
CMD_PACKET = 0xa0,
CMDF_ABORT = 0x100,
CMDF_NO_BM = 0x200,
};
enum {
BM_CMD_START = 0x1,
BM_CMD_WRITE = 0x8, /* write = from device to memory */
};
enum {
BM_STS_ACTIVE = 0x1,
BM_STS_ERROR = 0x2,
BM_STS_INTR = 0x4,
};
enum {
PRDT_EOT = 0x80000000,
};
#define assert_bit_set(data, mask) g_assert_cmphex((data) & (mask), ==, (mask))
#define assert_bit_clear(data, mask) g_assert_cmphex((data) & (mask), ==, 0)
static QPCIBus *pcibus = NULL;
static QGuestAllocator guest_malloc;
static char tmp_path[] = "/tmp/qtest.XXXXXX";
static char debug_path[] = "/tmp/qtest-blkdebug.XXXXXX";
static QTestState *ide_test_start(const char *cmdline_fmt, ...)
{
QTestState *qts;
va_list ap;
va_start(ap, cmdline_fmt);
qts = qtest_vinitf(cmdline_fmt, ap);
va_end(ap);
pc_alloc_init(&guest_malloc, qts, 0);
return qts;
}
static void ide_test_quit(QTestState *qts)
{
if (pcibus) {
qpci_free_pc(pcibus);
pcibus = NULL;
}
alloc_destroy(&guest_malloc);
qtest_quit(qts);
}
static QPCIDevice *get_pci_device(QTestState *qts, QPCIBar *bmdma_bar,
QPCIBar *ide_bar)
{
QPCIDevice *dev;
uint16_t vendor_id, device_id;
if (!pcibus) {
pcibus = qpci_new_pc(qts, NULL);
}
/* Find PCI device and verify it's the right one */
dev = qpci_device_find(pcibus, QPCI_DEVFN(IDE_PCI_DEV, IDE_PCI_FUNC));
g_assert(dev != NULL);
vendor_id = qpci_config_readw(dev, PCI_VENDOR_ID);
device_id = qpci_config_readw(dev, PCI_DEVICE_ID);
g_assert(vendor_id == PCI_VENDOR_ID_INTEL);
g_assert(device_id == PCI_DEVICE_ID_INTEL_82371SB_1);
/* Map bmdma BAR */
*bmdma_bar = qpci_iomap(dev, 4, NULL);
*ide_bar = qpci_legacy_iomap(dev, IDE_BASE);
qpci_device_enable(dev);
return dev;
}
static void free_pci_device(QPCIDevice *dev)
{
/* libqos doesn't have a function for this, so free it manually */
g_free(dev);
}
typedef struct PrdtEntry {
uint32_t addr;
uint32_t size;
} QEMU_PACKED PrdtEntry;
#define assert_bit_set(data, mask) g_assert_cmphex((data) & (mask), ==, (mask))
#define assert_bit_clear(data, mask) g_assert_cmphex((data) & (mask), ==, 0)
static uint64_t trim_range_le(uint64_t sector, uint16_t count)
{
/* 2-byte range, 6-byte LBA */
return cpu_to_le64(((uint64_t)count << 48) + sector);
}
static int send_dma_request(QTestState *qts, int cmd, uint64_t sector,
int nb_sectors, PrdtEntry *prdt, int prdt_entries,
void(*post_exec)(QPCIDevice *dev, QPCIBar ide_bar,
uint64_t sector, int nb_sectors))
{
QPCIDevice *dev;
QPCIBar bmdma_bar, ide_bar;
uintptr_t guest_prdt;
size_t len;
bool from_dev;
uint8_t status;
int flags;
dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
flags = cmd & ~0xff;
cmd &= 0xff;
switch (cmd) {
case CMD_READ_DMA:
case CMD_PACKET:
/* Assuming we only test data reads w/ ATAPI, otherwise we need to know
* the SCSI command being sent in the packet, too. */
from_dev = true;
break;
case CMD_DSM:
case CMD_WRITE_DMA:
from_dev = false;
break;
default:
g_assert_not_reached();
}
if (flags & CMDF_NO_BM) {
qpci_config_writew(dev, PCI_COMMAND,
PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
}
/* Select device 0 */
qpci_io_writeb(dev, ide_bar, reg_device, 0 | LBA);
/* Stop any running transfer, clear any pending interrupt */
qpci_io_writeb(dev, bmdma_bar, bmreg_cmd, 0);
qpci_io_writeb(dev, bmdma_bar, bmreg_status, BM_STS_INTR);
/* Setup PRDT */
len = sizeof(*prdt) * prdt_entries;
guest_prdt = guest_alloc(&guest_malloc, len);
qtest_memwrite(qts, guest_prdt, prdt, len);
qpci_io_writel(dev, bmdma_bar, bmreg_prdt, guest_prdt);
/* ATA DMA command */
if (cmd == CMD_PACKET) {
/* Enables ATAPI DMA; otherwise PIO is attempted */
qpci_io_writeb(dev, ide_bar, reg_feature, 0x01);
} else {
if (cmd == CMD_DSM) {
/* trim bit */
qpci_io_writeb(dev, ide_bar, reg_feature, 0x01);
}
qpci_io_writeb(dev, ide_bar, reg_nsectors, nb_sectors);
qpci_io_writeb(dev, ide_bar, reg_lba_low, sector & 0xff);
qpci_io_writeb(dev, ide_bar, reg_lba_middle, (sector >> 8) & 0xff);
qpci_io_writeb(dev, ide_bar, reg_lba_high, (sector >> 16) & 0xff);
}
qpci_io_writeb(dev, ide_bar, reg_command, cmd);
if (post_exec) {
post_exec(dev, ide_bar, sector, nb_sectors);
}
/* Start DMA transfer */
qpci_io_writeb(dev, bmdma_bar, bmreg_cmd,
BM_CMD_START | (from_dev ? BM_CMD_WRITE : 0));
if (flags & CMDF_ABORT) {
qpci_io_writeb(dev, bmdma_bar, bmreg_cmd, 0);
}
/* Wait for the DMA transfer to complete */
do {
status = qpci_io_readb(dev, bmdma_bar, bmreg_status);
} while ((status & (BM_STS_ACTIVE | BM_STS_INTR)) == BM_STS_ACTIVE);
g_assert_cmpint(qtest_get_irq(qts, IDE_PRIMARY_IRQ), ==,
!!(status & BM_STS_INTR));
/* Check IDE status code */
assert_bit_set(qpci_io_readb(dev, ide_bar, reg_status), DRDY);
assert_bit_clear(qpci_io_readb(dev, ide_bar, reg_status), BSY | DRQ);
/* Reading the status register clears the IRQ */
g_assert(!qtest_get_irq(qts, IDE_PRIMARY_IRQ));
/* Stop DMA transfer if still active */
if (status & BM_STS_ACTIVE) {
qpci_io_writeb(dev, bmdma_bar, bmreg_cmd, 0);
}
free_pci_device(dev);
return status;
}
static QTestState *test_bmdma_setup(void)
{
QTestState *qts;
qts = ide_test_start(
"-drive file=%s,if=ide,cache=writeback,format=raw "
"-global ide-hd.serial=%s -global ide-hd.ver=%s",
tmp_path, "testdisk", "version");
qtest_irq_intercept_in(qts, "ioapic");
return qts;
}
static void test_bmdma_teardown(QTestState *qts)
{
ide_test_quit(qts);
}
static void test_bmdma_simple_rw(void)
{
QTestState *qts;
QPCIDevice *dev;
QPCIBar bmdma_bar, ide_bar;
uint8_t status;
uint8_t *buf;
uint8_t *cmpbuf;
size_t len = 512;
uintptr_t guest_buf;
PrdtEntry prdt[1];
qts = test_bmdma_setup();
guest_buf = guest_alloc(&guest_malloc, len);
prdt[0].addr = cpu_to_le32(guest_buf);
prdt[0].size = cpu_to_le32(len | PRDT_EOT);
dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
buf = g_malloc(len);
cmpbuf = g_malloc(len);
/* Write 0x55 pattern to sector 0 */
memset(buf, 0x55, len);
qtest_memwrite(qts, guest_buf, buf, len);
status = send_dma_request(qts, CMD_WRITE_DMA, 0, 1, prdt,
ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(qpci_io_readb(dev, ide_bar, reg_status), DF | ERR);
/* Write 0xaa pattern to sector 1 */
memset(buf, 0xaa, len);
qtest_memwrite(qts, guest_buf, buf, len);
status = send_dma_request(qts, CMD_WRITE_DMA, 1, 1, prdt,
ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(qpci_io_readb(dev, ide_bar, reg_status), DF | ERR);
/* Read and verify 0x55 pattern in sector 0 */
memset(cmpbuf, 0x55, len);
status = send_dma_request(qts, CMD_READ_DMA, 0, 1, prdt, ARRAY_SIZE(prdt),
NULL);
g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(qpci_io_readb(dev, ide_bar, reg_status), DF | ERR);
qtest_memread(qts, guest_buf, buf, len);
g_assert(memcmp(buf, cmpbuf, len) == 0);
/* Read and verify 0xaa pattern in sector 1 */
memset(cmpbuf, 0xaa, len);
status = send_dma_request(qts, CMD_READ_DMA, 1, 1, prdt, ARRAY_SIZE(prdt),
NULL);
g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(qpci_io_readb(dev, ide_bar, reg_status), DF | ERR);
qtest_memread(qts, guest_buf, buf, len);
g_assert(memcmp(buf, cmpbuf, len) == 0);
free_pci_device(dev);
g_free(buf);
g_free(cmpbuf);
test_bmdma_teardown(qts);
}
static void test_bmdma_trim(void)
{
QTestState *qts;
QPCIDevice *dev;
QPCIBar bmdma_bar, ide_bar;
uint8_t status;
const uint64_t trim_range[] = { trim_range_le(0, 2),
trim_range_le(6, 8),
trim_range_le(10, 1),
};
const uint64_t bad_range = trim_range_le(TEST_IMAGE_SIZE / 512 - 1, 2);
size_t len = 512;
uint8_t *buf;
uintptr_t guest_buf;
PrdtEntry prdt[1];
qts = test_bmdma_setup();
guest_buf = guest_alloc(&guest_malloc, len);
prdt[0].addr = cpu_to_le32(guest_buf),
prdt[0].size = cpu_to_le32(len | PRDT_EOT),
dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
buf = g_malloc(len);
/* Normal request */
*((uint64_t *)buf) = trim_range[0];
*((uint64_t *)buf + 1) = trim_range[1];
qtest_memwrite(qts, guest_buf, buf, 2 * sizeof(uint64_t));
status = send_dma_request(qts, CMD_DSM, 0, 1, prdt,
ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(qpci_io_readb(dev, ide_bar, reg_status), DF | ERR);
/* Request contains invalid range */
*((uint64_t *)buf) = trim_range[2];
*((uint64_t *)buf + 1) = bad_range;
qtest_memwrite(qts, guest_buf, buf, 2 * sizeof(uint64_t));
status = send_dma_request(qts, CMD_DSM, 0, 1, prdt,
ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_set(qpci_io_readb(dev, ide_bar, reg_status), ERR);
assert_bit_set(qpci_io_readb(dev, ide_bar, reg_error), ABRT);
free_pci_device(dev);
g_free(buf);
test_bmdma_teardown(qts);
}
/*
* This test is developed according to the Programming Interface for
* Bus Master IDE Controller (Revision 1.0 5/16/94)
*/
static void test_bmdma_various_prdts(void)
{
int sectors = 0;
uint32_t size = 0;
for (sectors = 1; sectors <= 256; sectors *= 2) {
QTestState *qts = NULL;
QPCIDevice *dev = NULL;
QPCIBar bmdma_bar, ide_bar;
qts = test_bmdma_setup();
dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
for (size = 0; size < 65536; size += 256) {
uint32_t req_size = sectors * 512;
uint32_t prd_size = size & 0xfffe; /* bit 0 is always set to 0 */
uint8_t ret = 0;
uint8_t req_status = 0;
uint8_t abort_req_status = 0;
PrdtEntry prdt[] = {
{
.addr = 0,
.size = cpu_to_le32(size | PRDT_EOT),
},
};
/* A value of zero in PRD size indicates 64K */
if (prd_size == 0) {
prd_size = 65536;
}
/*
* 1. If PRDs specified a smaller size than the IDE transfer
* size, then the Interrupt and Active bits in the Controller
* status register are not set (Error Condition).
*
* 2. If the size of the physical memory regions was equal to
* the IDE device transfer size, the Interrupt bit in the
* Controller status register is set to 1, Active bit is set to 0.
*
* 3. If PRDs specified a larger size than the IDE transfer size,
* the Interrupt and Active bits in the Controller status register
* are both set to 1.
*/
if (prd_size < req_size) {
req_status = 0;
abort_req_status = 0;
} else if (prd_size == req_size) {
req_status = BM_STS_INTR;
abort_req_status = BM_STS_INTR;
} else {
req_status = BM_STS_ACTIVE | BM_STS_INTR;
abort_req_status = BM_STS_INTR;
}
/* Test the request */
ret = send_dma_request(qts, CMD_READ_DMA, 0, sectors,
prdt, ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(ret, ==, req_status);
assert_bit_clear(qpci_io_readb(dev, ide_bar, reg_status), DF | ERR);
/* Now test aborting the same request */
ret = send_dma_request(qts, CMD_READ_DMA | CMDF_ABORT, 0,
sectors, prdt, ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(ret, ==, abort_req_status);
assert_bit_clear(qpci_io_readb(dev, ide_bar, reg_status), DF | ERR);
}
free_pci_device(dev);
test_bmdma_teardown(qts);
}
}
static void test_bmdma_no_busmaster(void)
{
QTestState *qts;
QPCIDevice *dev;
QPCIBar bmdma_bar, ide_bar;
uint8_t status;
qts = test_bmdma_setup();
dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
/* No PRDT_EOT, each entry addr 0/size 64k, and in theory qemu shouldn't be
* able to access it anyway because the Bus Master bit in the PCI command
* register isn't set. This is complete nonsense, but it used to be pretty
* good at confusing and occasionally crashing qemu. */
PrdtEntry prdt[4096] = { };
status = send_dma_request(qts, CMD_READ_DMA | CMDF_NO_BM, 0, 512,
prdt, ARRAY_SIZE(prdt), NULL);
/* Not entirely clear what the expected result is, but this is what we get
* in practice. At least we want to be aware of any changes. */
g_assert_cmphex(status, ==, BM_STS_ACTIVE | BM_STS_INTR);
assert_bit_clear(qpci_io_readb(dev, ide_bar, reg_status), DF | ERR);
free_pci_device(dev);
test_bmdma_teardown(qts);
}
static void string_cpu_to_be16(uint16_t *s, size_t bytes)
{
g_assert((bytes & 1) == 0);
bytes /= 2;
while (bytes--) {
*s = cpu_to_be16(*s);
s++;
}
}
static void test_identify(void)
{
QTestState *qts;
QPCIDevice *dev;
QPCIBar bmdma_bar, ide_bar;
uint8_t data;
uint16_t buf[256];
int i;
int ret;
qts = ide_test_start(
"-drive file=%s,if=ide,cache=writeback,format=raw "
"-global ide-hd.serial=%s -global ide-hd.ver=%s",
tmp_path, "testdisk", "version");
dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
/* IDENTIFY command on device 0*/
qpci_io_writeb(dev, ide_bar, reg_device, 0);
qpci_io_writeb(dev, ide_bar, reg_command, CMD_IDENTIFY);
/* Read in the IDENTIFY buffer and check registers */
data = qpci_io_readb(dev, ide_bar, reg_device);
g_assert_cmpint(data & DEV, ==, 0);
for (i = 0; i < 256; i++) {
data = qpci_io_readb(dev, ide_bar, reg_status);
assert_bit_set(data, DRDY | DRQ);
assert_bit_clear(data, BSY | DF | ERR);
buf[i] = qpci_io_readw(dev, ide_bar, reg_data);
}
data = qpci_io_readb(dev, ide_bar, reg_status);
assert_bit_set(data, DRDY);
assert_bit_clear(data, BSY | DF | ERR | DRQ);
/* Check serial number/version in the buffer */
string_cpu_to_be16(&buf[10], 20);
ret = memcmp(&buf[10], "testdisk ", 20);
g_assert(ret == 0);
string_cpu_to_be16(&buf[23], 8);
ret = memcmp(&buf[23], "version ", 8);
g_assert(ret == 0);
/* Write cache enabled bit */
assert_bit_set(buf[85], 0x20);
ide_test_quit(qts);
free_pci_device(dev);
}
/*
* Write sector 1 with random data to make IDE storage dirty
* Needed for flush tests so that flushes actually go though the block layer
*/
static void make_dirty(QTestState *qts, uint8_t device)
{
QPCIDevice *dev;
QPCIBar bmdma_bar, ide_bar;
uint8_t status;
size_t len = 512;
uintptr_t guest_buf;
void* buf;
dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
guest_buf = guest_alloc(&guest_malloc, len);
buf = g_malloc(len);
memset(buf, rand() % 255 + 1, len);
g_assert(guest_buf);
g_assert(buf);
qtest_memwrite(qts, guest_buf, buf, len);
PrdtEntry prdt[] = {
{
.addr = cpu_to_le32(guest_buf),
.size = cpu_to_le32(len | PRDT_EOT),
},
};
status = send_dma_request(qts, CMD_WRITE_DMA, 1, 1, prdt,
ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(qpci_io_readb(dev, ide_bar, reg_status), DF | ERR);
g_free(buf);
free_pci_device(dev);
}
static void test_flush(void)
{
QTestState *qts;
QPCIDevice *dev;
QPCIBar bmdma_bar, ide_bar;
uint8_t data;
qts = ide_test_start(
"-drive file=blkdebug::%s,if=ide,cache=writeback,format=raw",
tmp_path);
dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
qtest_irq_intercept_in(qts, "ioapic");
/* Dirty media so that CMD_FLUSH_CACHE will actually go to disk */
make_dirty(qts, 0);
/* Delay the completion of the flush request until we explicitly do it */
g_free(qtest_hmp(qts, "qemu-io ide0-hd0 \"break flush_to_os A\""));
/* FLUSH CACHE command on device 0*/
qpci_io_writeb(dev, ide_bar, reg_device, 0);
qpci_io_writeb(dev, ide_bar, reg_command, CMD_FLUSH_CACHE);
/* Check status while request is in flight*/
data = qpci_io_readb(dev, ide_bar, reg_status);
assert_bit_set(data, BSY | DRDY);
assert_bit_clear(data, DF | ERR | DRQ);
/* Complete the command */
g_free(qtest_hmp(qts, "qemu-io ide0-hd0 \"resume A\""));
/* Check registers */
data = qpci_io_readb(dev, ide_bar, reg_device);
g_assert_cmpint(data & DEV, ==, 0);
do {
data = qpci_io_readb(dev, ide_bar, reg_status);
} while (data & BSY);
assert_bit_set(data, DRDY);
assert_bit_clear(data, BSY | DF | ERR | DRQ);
ide_test_quit(qts);
free_pci_device(dev);
}
static void test_retry_flush(const char *machine)
{
QTestState *qts;
QPCIDevice *dev;
QPCIBar bmdma_bar, ide_bar;
uint8_t data;
prepare_blkdebug_script(debug_path, "flush_to_disk");
qts = ide_test_start(
"-drive file=blkdebug:%s:%s,if=ide,cache=writeback,format=raw,"
"rerror=stop,werror=stop",
debug_path, tmp_path);
dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
qtest_irq_intercept_in(qts, "ioapic");
/* Dirty media so that CMD_FLUSH_CACHE will actually go to disk */
make_dirty(qts, 0);
/* FLUSH CACHE command on device 0*/
qpci_io_writeb(dev, ide_bar, reg_device, 0);
qpci_io_writeb(dev, ide_bar, reg_command, CMD_FLUSH_CACHE);
/* Check status while request is in flight*/
data = qpci_io_readb(dev, ide_bar, reg_status);
assert_bit_set(data, BSY | DRDY);
assert_bit_clear(data, DF | ERR | DRQ);
qtest_qmp_eventwait(qts, "STOP");
/* Complete the command */
qmp_discard_response(qts, "{'execute':'cont' }");
/* Check registers */
data = qpci_io_readb(dev, ide_bar, reg_device);
g_assert_cmpint(data & DEV, ==, 0);
do {
data = qpci_io_readb(dev, ide_bar, reg_status);
} while (data & BSY);
assert_bit_set(data, DRDY);
assert_bit_clear(data, BSY | DF | ERR | DRQ);
ide_test_quit(qts);
free_pci_device(dev);
}
static void test_flush_nodev(void)
{
QTestState *qts;
QPCIDevice *dev;
QPCIBar bmdma_bar, ide_bar;
qts = ide_test_start("");
dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
/* FLUSH CACHE command on device 0*/
qpci_io_writeb(dev, ide_bar, reg_device, 0);
qpci_io_writeb(dev, ide_bar, reg_command, CMD_FLUSH_CACHE);
/* Just testing that qemu doesn't crash... */
free_pci_device(dev);
ide_test_quit(qts);
}
static void test_flush_empty_drive(void)
{
QTestState *qts;
QPCIDevice *dev;
QPCIBar bmdma_bar, ide_bar;
qts = ide_test_start("-device ide-cd,bus=ide.0");
dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
/* FLUSH CACHE command on device 0 */
qpci_io_writeb(dev, ide_bar, reg_device, 0);
qpci_io_writeb(dev, ide_bar, reg_command, CMD_FLUSH_CACHE);
/* Just testing that qemu doesn't crash... */
free_pci_device(dev);
ide_test_quit(qts);
}
static void test_pci_retry_flush(void)
{
test_retry_flush("pc");
}
static void test_isa_retry_flush(void)
{
test_retry_flush("isapc");
}
typedef struct Read10CDB {
uint8_t opcode;
uint8_t flags;
uint32_t lba;
uint8_t reserved;
uint16_t nblocks;
uint8_t control;
uint16_t padding;
} __attribute__((__packed__)) Read10CDB;
static void send_scsi_cdb_read10(QPCIDevice *dev, QPCIBar ide_bar,
uint64_t lba, int nblocks)
{
Read10CDB pkt = { .padding = 0 };
int i;
g_assert_cmpint(lba, <=, UINT32_MAX);
g_assert_cmpint(nblocks, <=, UINT16_MAX);
g_assert_cmpint(nblocks, >=, 0);
/* Construct SCSI CDB packet */
pkt.opcode = 0x28;
pkt.lba = cpu_to_be32(lba);
pkt.nblocks = cpu_to_be16(nblocks);
/* Send Packet */
for (i = 0; i < sizeof(Read10CDB)/2; i++) {
qpci_io_writew(dev, ide_bar, reg_data,
le16_to_cpu(((uint16_t *)&pkt)[i]));
}
}
static void nsleep(QTestState *qts, int64_t nsecs)
{
const struct timespec val = { .tv_nsec = nsecs };
nanosleep(&val, NULL);
qtest_clock_set(qts, nsecs);
}
static uint8_t ide_wait_clear(QTestState *qts, uint8_t flag)
{
QPCIDevice *dev;
QPCIBar bmdma_bar, ide_bar;
uint8_t data;
time_t st;
dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
/* Wait with a 5 second timeout */
time(&st);
while (true) {
data = qpci_io_readb(dev, ide_bar, reg_status);
if (!(data & flag)) {
free_pci_device(dev);
return data;
}
if (difftime(time(NULL), st) > 5.0) {
break;
}
nsleep(qts, 400);
}
g_assert_not_reached();
}
static void ide_wait_intr(QTestState *qts, int irq)
{
time_t st;
bool intr;
time(&st);
while (true) {
intr = qtest_get_irq(qts, irq);
if (intr) {
return;
}
if (difftime(time(NULL), st) > 5.0) {
break;
}
nsleep(qts, 400);
}
g_assert_not_reached();
}
static void cdrom_pio_impl(int nblocks)
{
QTestState *qts;
QPCIDevice *dev;
QPCIBar bmdma_bar, ide_bar;
FILE *fh;
int patt_blocks = MAX(16, nblocks);
size_t patt_len = ATAPI_BLOCK_SIZE * patt_blocks;
char *pattern = g_malloc(patt_len);
size_t rxsize = ATAPI_BLOCK_SIZE * nblocks;
uint16_t *rx = g_malloc0(rxsize);
int i, j;
uint8_t data;
uint16_t limit;
size_t ret;
/* Prepopulate the CDROM with an interesting pattern */
generate_pattern(pattern, patt_len, ATAPI_BLOCK_SIZE);
fh = fopen(tmp_path, "w+");
ret = fwrite(pattern, ATAPI_BLOCK_SIZE, patt_blocks, fh);
g_assert_cmpint(ret, ==, patt_blocks);
fclose(fh);
qts = ide_test_start(
"-drive if=none,file=%s,media=cdrom,format=raw,id=sr0,index=0 "
"-device ide-cd,drive=sr0,bus=ide.0", tmp_path);
dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
qtest_irq_intercept_in(qts, "ioapic");
/* PACKET command on device 0 */
qpci_io_writeb(dev, ide_bar, reg_device, 0);
qpci_io_writeb(dev, ide_bar, reg_lba_middle, BYTE_COUNT_LIMIT & 0xFF);
qpci_io_writeb(dev, ide_bar, reg_lba_high, (BYTE_COUNT_LIMIT >> 8 & 0xFF));
qpci_io_writeb(dev, ide_bar, reg_command, CMD_PACKET);
/* HP0: Check_Status_A State */
nsleep(qts, 400);
data = ide_wait_clear(qts, BSY);
/* HP1: Send_Packet State */
assert_bit_set(data, DRQ | DRDY);
assert_bit_clear(data, ERR | DF | BSY);
/* SCSI CDB (READ10) -- read n*2048 bytes from block 0 */
send_scsi_cdb_read10(dev, ide_bar, 0, nblocks);
/* Read data back: occurs in bursts of 'BYTE_COUNT_LIMIT' bytes.
* If BYTE_COUNT_LIMIT is odd, we transfer BYTE_COUNT_LIMIT - 1 bytes.
* We allow an odd limit only when the remaining transfer size is
* less than BYTE_COUNT_LIMIT. However, SCSI's read10 command can only
* request n blocks, so our request size is always even.
* For this reason, we assume there is never a hanging byte to fetch. */
g_assert(!(rxsize & 1));
limit = BYTE_COUNT_LIMIT & ~1;
for (i = 0; i < DIV_ROUND_UP(rxsize, limit); i++) {
size_t offset = i * (limit / 2);
size_t rem = (rxsize / 2) - offset;
/* HP3: INTRQ_Wait */
ide_wait_intr(qts, IDE_PRIMARY_IRQ);
/* HP2: Check_Status_B (and clear IRQ) */
data = ide_wait_clear(qts, BSY);
assert_bit_set(data, DRQ | DRDY);
assert_bit_clear(data, ERR | DF | BSY);
/* HP4: Transfer_Data */
for (j = 0; j < MIN((limit / 2), rem); j++) {
rx[offset + j] = cpu_to_le16(qpci_io_readw(dev, ide_bar,
reg_data));
}
}
/* Check for final completion IRQ */
ide_wait_intr(qts, IDE_PRIMARY_IRQ);
/* Sanity check final state */
data = ide_wait_clear(qts, DRQ);
assert_bit_set(data, DRDY);
assert_bit_clear(data, DRQ | ERR | DF | BSY);
g_assert_cmpint(memcmp(pattern, rx, rxsize), ==, 0);
g_free(pattern);
g_free(rx);
test_bmdma_teardown(qts);
free_pci_device(dev);
}
static void test_cdrom_pio(void)
{
cdrom_pio_impl(1);
}
static void test_cdrom_pio_large(void)
{
/* Test a few loops of the PIO DRQ mechanism. */
cdrom_pio_impl(BYTE_COUNT_LIMIT * 4 / ATAPI_BLOCK_SIZE);
}
static void test_cdrom_dma(void)
{
QTestState *qts;
static const size_t len = ATAPI_BLOCK_SIZE;
size_t ret;
char *pattern = g_malloc(ATAPI_BLOCK_SIZE * 16);
char *rx = g_malloc0(len);
uintptr_t guest_buf;
PrdtEntry prdt[1];
FILE *fh;
qts = ide_test_start(
"-drive if=none,file=%s,media=cdrom,format=raw,id=sr0,index=0 "
"-device ide-cd,drive=sr0,bus=ide.0", tmp_path);
qtest_irq_intercept_in(qts, "ioapic");
guest_buf = guest_alloc(&guest_malloc, len);
prdt[0].addr = cpu_to_le32(guest_buf);
prdt[0].size = cpu_to_le32(len | PRDT_EOT);
generate_pattern(pattern, ATAPI_BLOCK_SIZE * 16, ATAPI_BLOCK_SIZE);
fh = fopen(tmp_path, "w+");
ret = fwrite(pattern, ATAPI_BLOCK_SIZE, 16, fh);
g_assert_cmpint(ret, ==, 16);
fclose(fh);
send_dma_request(qts, CMD_PACKET, 0, 1, prdt, 1, send_scsi_cdb_read10);
/* Read back data from guest memory into local qtest memory */
qtest_memread(qts, guest_buf, rx, len);
g_assert_cmpint(memcmp(pattern, rx, len), ==, 0);
g_free(pattern);
g_free(rx);
test_bmdma_teardown(qts);
}
int main(int argc, char **argv)
{
int fd;
int ret;
/* Create temporary blkdebug instructions */
fd = mkstemp(debug_path);
g_assert(fd >= 0);
close(fd);
/* Create a temporary raw image */
fd = mkstemp(tmp_path);
g_assert(fd >= 0);
ret = ftruncate(fd, TEST_IMAGE_SIZE);
g_assert(ret == 0);
close(fd);
/* Run the tests */
g_test_init(&argc, &argv, NULL);
qtest_add_func("/ide/identify", test_identify);
qtest_add_func("/ide/bmdma/simple_rw", test_bmdma_simple_rw);
qtest_add_func("/ide/bmdma/trim", test_bmdma_trim);
qtest_add_func("/ide/bmdma/various_prdts", test_bmdma_various_prdts);
qtest_add_func("/ide/bmdma/no_busmaster", test_bmdma_no_busmaster);
qtest_add_func("/ide/flush", test_flush);
qtest_add_func("/ide/flush/nodev", test_flush_nodev);
qtest_add_func("/ide/flush/empty_drive", test_flush_empty_drive);
qtest_add_func("/ide/flush/retry_pci", test_pci_retry_flush);
qtest_add_func("/ide/flush/retry_isa", test_isa_retry_flush);
qtest_add_func("/ide/cdrom/pio", test_cdrom_pio);
qtest_add_func("/ide/cdrom/pio_large", test_cdrom_pio_large);
qtest_add_func("/ide/cdrom/dma", test_cdrom_dma);
ret = g_test_run();
/* Cleanup */
unlink(tmp_path);
unlink(debug_path);
return ret;
}
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