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authorKevin Wolf <kwolf@redhat.com>2013-05-08 11:34:20 +0200
committerKevin Wolf <kwolf@redhat.com>2013-05-08 15:28:49 +0200
commitb95739dcf5ae1dfa8cd5b2a5be27d427835e693b (patch)
tree8da99ff71db3a6f15566f8214b12da7551b9d4ee
parentacbe48013bf1eb9c9a435e76959f409584b35509 (diff)
downloadqemu-arm-b95739dcf5ae1dfa8cd5b2a5be27d427835e693b.tar.gz
qtest/ide-test: Add simple DMA read/write test case
This tests that single sectors can be successfully written and correctly read back. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
-rw-r--r--tests/ide-test.c221
1 files changed, 221 insertions, 0 deletions
diff --git a/tests/ide-test.c b/tests/ide-test.c
index 45036e3bd4..5fc496fd0a 100644
--- a/tests/ide-test.c
+++ b/tests/ide-test.c
@@ -29,8 +29,12 @@
#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
@@ -60,12 +64,42 @@ enum {
};
enum {
+ LBA = 0x40,
+};
+
+enum {
+ bmreg_cmd = 0x0,
+ bmreg_status = 0x2,
+ bmreg_prdt = 0x4,
+};
+
+enum {
+ CMD_READ_DMA = 0xc8,
+ CMD_WRITE_DMA = 0xca,
CMD_IDENTIFY = 0xec,
};
+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, ...)
@@ -79,6 +113,7 @@ static void ide_test_start(const char *cmdline_fmt, ...)
qtest_start(cmdline);
qtest_irq_intercept_in(global_qtest, "ioapic");
+ guest_malloc = pc_alloc_init();
}
static void ide_test_quit(void)
@@ -86,6 +121,188 @@ static void ide_test_quit(void)
qtest_quit(global_qtest);
}
+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;
+
+ dev = get_pci_device(&bmdma_base);
+
+ switch (cmd) {
+ case CMD_READ_DMA:
+ from_dev = true;
+ break;
+ case CMD_WRITE_DMA:
+ from_dev = false;
+ break;
+ default:
+ g_assert_not_reached();
+ }
+
+ /* 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));
+
+ /* 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 = guest_buf, .size = 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_setup(void)
+{
+ ide_test_start(
+ "-vnc none "
+ "-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 test_identify(void)
{
uint8_t data;
@@ -156,6 +373,10 @@ int main(int argc, char **argv)
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/teardown", test_bmdma_teardown);
+
ret = g_test_run();
/* Cleanup */