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qemu/tests/ide-test.c

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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 <stdint.h>
#include <string.h>
#include <stdio.h>
#include <glib.h>
#include "libqtest.h"
#include "libqos/pci-pc.h"
#include "libqos/malloc-pc.h"
#include "qemu-common.h"
#include "hw/pci/pci_ids.h"
#include "hw/pci/pci_regs.h"
#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
enum {
reg_data = 0x0,
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,
};
enum {
DEV = 0x10,
LBA = 0x40,
};
enum {
bmreg_cmd = 0x0,
bmreg_status = 0x2,
bmreg_prdt = 0x4,
};
enum {
CMD_READ_DMA = 0xc8,
CMD_WRITE_DMA = 0xca,
CMD_FLUSH_CACHE = 0xe7,
CMD_IDENTIFY = 0xec,
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 void ide_test_start(const char *cmdline_fmt, ...)
{
va_list ap;
char *cmdline;
va_start(ap, cmdline_fmt);
cmdline = g_strdup_vprintf(cmdline_fmt, ap);
va_end(ap);
qtest_start(cmdline);
qtest_irq_intercept_in(global_qtest, "ioapic");
guest_malloc = pc_alloc_init();
}
static void ide_test_quit(void)
{
qtest_end();
}
static QPCIDevice *get_pci_device(uint16_t *bmdma_base)
{
QPCIDevice *dev;
uint16_t vendor_id, device_id;
if (!pcibus) {
pcibus = qpci_init_pc();
}
/* 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_base = (uint16_t)(uintptr_t) qpci_iomap(dev, 4);
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 int send_dma_request(int cmd, uint64_t sector, int nb_sectors,
PrdtEntry *prdt, int prdt_entries)
{
QPCIDevice *dev;
uint16_t bmdma_base;
uintptr_t guest_prdt;
size_t len;
bool from_dev;
uint8_t status;
int flags;
dev = get_pci_device(&bmdma_base);
flags = cmd & ~0xff;
cmd &= 0xff;
switch (cmd) {
case CMD_READ_DMA:
from_dev = true;
break;
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 */
outb(IDE_BASE + reg_device, 0 | LBA);
/* Stop any running transfer, clear any pending interrupt */
outb(bmdma_base + bmreg_cmd, 0);
outb(bmdma_base + bmreg_status, BM_STS_INTR);
/* Setup PRDT */
len = sizeof(*prdt) * prdt_entries;
guest_prdt = guest_alloc(guest_malloc, len);
memwrite(guest_prdt, prdt, len);
outl(bmdma_base + bmreg_prdt, guest_prdt);
/* ATA DMA command */
outb(IDE_BASE + reg_nsectors, nb_sectors);
outb(IDE_BASE + reg_lba_low, sector & 0xff);
outb(IDE_BASE + reg_lba_middle, (sector >> 8) & 0xff);
outb(IDE_BASE + reg_lba_high, (sector >> 16) & 0xff);
outb(IDE_BASE + reg_command, cmd);
/* Start DMA transfer */
outb(bmdma_base + bmreg_cmd, BM_CMD_START | (from_dev ? BM_CMD_WRITE : 0));
if (flags & CMDF_ABORT) {
outb(bmdma_base + bmreg_cmd, 0);
}
/* Wait for the DMA transfer to complete */
do {
status = inb(bmdma_base + bmreg_status);
} while ((status & (BM_STS_ACTIVE | BM_STS_INTR)) == BM_STS_ACTIVE);
g_assert_cmpint(get_irq(IDE_PRIMARY_IRQ), ==, !!(status & BM_STS_INTR));
/* Check IDE status code */
assert_bit_set(inb(IDE_BASE + reg_status), DRDY);
assert_bit_clear(inb(IDE_BASE + reg_status), BSY | DRQ);
/* Reading the status register clears the IRQ */
g_assert(!get_irq(IDE_PRIMARY_IRQ));
/* Stop DMA transfer if still active */
if (status & BM_STS_ACTIVE) {
outb(bmdma_base + bmreg_cmd, 0);
}
free_pci_device(dev);
return status;
}
static void test_bmdma_simple_rw(void)
{
uint8_t status;
uint8_t *buf;
uint8_t *cmpbuf;
size_t len = 512;
uintptr_t guest_buf = guest_alloc(guest_malloc, len);
PrdtEntry prdt[] = {
{
.addr = cpu_to_le32(guest_buf),
.size = cpu_to_le32(len | PRDT_EOT),
},
};
buf = g_malloc(len);
cmpbuf = g_malloc(len);
/* Write 0x55 pattern to sector 0 */
memset(buf, 0x55, len);
memwrite(guest_buf, buf, len);
status = send_dma_request(CMD_WRITE_DMA, 0, 1, prdt, ARRAY_SIZE(prdt));
g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
/* Write 0xaa pattern to sector 1 */
memset(buf, 0xaa, len);
memwrite(guest_buf, buf, len);
status = send_dma_request(CMD_WRITE_DMA, 1, 1, prdt, ARRAY_SIZE(prdt));
g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
/* Read and verify 0x55 pattern in sector 0 */
memset(cmpbuf, 0x55, len);
status = send_dma_request(CMD_READ_DMA, 0, 1, prdt, ARRAY_SIZE(prdt));
g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
memread(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(CMD_READ_DMA, 1, 1, prdt, ARRAY_SIZE(prdt));
g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
memread(guest_buf, buf, len);
g_assert(memcmp(buf, cmpbuf, len) == 0);
g_free(buf);
g_free(cmpbuf);
}
static void test_bmdma_short_prdt(void)
{
uint8_t status;
PrdtEntry prdt[] = {
{
.addr = 0,
.size = cpu_to_le32(0x10 | PRDT_EOT),
},
};
/* Normal request */
status = send_dma_request(CMD_READ_DMA, 0, 1,
prdt, ARRAY_SIZE(prdt));
g_assert_cmphex(status, ==, 0);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
/* Abort the request before it completes */
status = send_dma_request(CMD_READ_DMA | CMDF_ABORT, 0, 1,
prdt, ARRAY_SIZE(prdt));
g_assert_cmphex(status, ==, 0);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
}
static void test_bmdma_long_prdt(void)
{
uint8_t status;
PrdtEntry prdt[] = {
{
.addr = 0,
.size = cpu_to_le32(0x1000 | PRDT_EOT),
},
};
/* Normal request */
status = send_dma_request(CMD_READ_DMA, 0, 1,
prdt, ARRAY_SIZE(prdt));
g_assert_cmphex(status, ==, BM_STS_ACTIVE | BM_STS_INTR);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
/* Abort the request before it completes */
status = send_dma_request(CMD_READ_DMA | CMDF_ABORT, 0, 1,
prdt, ARRAY_SIZE(prdt));
g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
}
static void test_bmdma_no_busmaster(void)
{
uint8_t status;
/* 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(CMD_READ_DMA | CMDF_NO_BM, 0, 512,
prdt, ARRAY_SIZE(prdt));
/* 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(inb(IDE_BASE + reg_status), DF | ERR);
}
static void test_bmdma_setup(void)
{
ide_test_start(
"-drive file=%s,if=ide,serial=%s,cache=writeback "
"-global ide-hd.ver=%s",
tmp_path, "testdisk", "version");
}
static void test_bmdma_teardown(void)
{
ide_test_quit();
}
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)
{
uint8_t data;
uint16_t buf[256];
int i;
int ret;
ide_test_start(
"-drive file=%s,if=ide,serial=%s,cache=writeback "
"-global ide-hd.ver=%s",
tmp_path, "testdisk", "version");
/* IDENTIFY command on device 0*/
outb(IDE_BASE + reg_device, 0);
outb(IDE_BASE + reg_command, CMD_IDENTIFY);
/* Read in the IDENTIFY buffer and check registers */
data = inb(IDE_BASE + reg_device);
g_assert_cmpint(data & DEV, ==, 0);
for (i = 0; i < 256; i++) {
data = inb(IDE_BASE + reg_status);
assert_bit_set(data, DRDY | DRQ);
assert_bit_clear(data, BSY | DF | ERR);
((uint16_t*) buf)[i] = inw(IDE_BASE + reg_data);
}
data = inb(IDE_BASE + 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();
}
static void test_flush(void)
{
uint8_t data;
ide_test_start(
"-drive file=blkdebug::%s,if=ide,cache=writeback",
tmp_path);
/* Delay the completion of the flush request until we explicitly do it */
qmp_discard_response("{'execute':'human-monitor-command', 'arguments': {"
" 'command-line':"
" 'qemu-io ide0-hd0 \"break flush_to_os A\"'} }");
/* FLUSH CACHE command on device 0*/
outb(IDE_BASE + reg_device, 0);
outb(IDE_BASE + reg_command, CMD_FLUSH_CACHE);
/* Check status while request is in flight*/
data = inb(IDE_BASE + reg_status);
assert_bit_set(data, BSY | DRDY);
assert_bit_clear(data, DF | ERR | DRQ);
/* Complete the command */
qmp_discard_response("{'execute':'human-monitor-command', 'arguments': {"
" 'command-line':"
" 'qemu-io ide0-hd0 \"resume A\"'} }");
/* Check registers */
data = inb(IDE_BASE + reg_device);
g_assert_cmpint(data & DEV, ==, 0);
do {
data = inb(IDE_BASE + reg_status);
} while (data & BSY);
assert_bit_set(data, DRDY);
assert_bit_clear(data, BSY | DF | ERR | DRQ);
ide_test_quit();
}
int main(int argc, char **argv)
{
const char *arch = qtest_get_arch();
int fd;
int ret;
/* Check architecture */
if (strcmp(arch, "i386") && strcmp(arch, "x86_64")) {
g_test_message("Skipping test for non-x86\n");
return 0;
}
/* 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/setup", test_bmdma_setup);
qtest_add_func("/ide/bmdma/simple_rw", test_bmdma_simple_rw);
qtest_add_func("/ide/bmdma/short_prdt", test_bmdma_short_prdt);
qtest_add_func("/ide/bmdma/long_prdt", test_bmdma_long_prdt);
qtest_add_func("/ide/bmdma/no_busmaster", test_bmdma_no_busmaster);
qtest_add_func("/ide/bmdma/teardown", test_bmdma_teardown);
qtest_add_func("/ide/flush", test_flush);
ret = g_test_run();
/* Cleanup */
unlink(tmp_path);
return ret;
}
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