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https://gitlab.com/qemu-project/qemu
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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>
This commit is contained in:
Kevin Wolf
parent
acbe48013b
commit
b95739dcf5
1 changed files with 221 additions and 0 deletions
221
tests/ide-test.c
221
tests/ide-test.c
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@ -29,8 +29,12 @@
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#include <glib.h>
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#include "libqtest.h"
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#include "libqos/pci-pc.h"
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#include "libqos/malloc-pc.h"
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#include "qemu-common.h"
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#include "hw/pci/pci_ids.h"
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#include "hw/pci/pci_regs.h"
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#define TEST_IMAGE_SIZE 64 * 1024 * 1024
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@ -60,12 +64,42 @@ enum {
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};
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enum {
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LBA = 0x40,
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};
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enum {
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bmreg_cmd = 0x0,
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bmreg_status = 0x2,
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bmreg_prdt = 0x4,
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};
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enum {
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CMD_READ_DMA = 0xc8,
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CMD_WRITE_DMA = 0xca,
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CMD_IDENTIFY = 0xec,
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};
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enum {
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BM_CMD_START = 0x1,
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BM_CMD_WRITE = 0x8, /* write = from device to memory */
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};
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enum {
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BM_STS_ACTIVE = 0x1,
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BM_STS_ERROR = 0x2,
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BM_STS_INTR = 0x4,
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};
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enum {
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PRDT_EOT = 0x80000000,
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};
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#define assert_bit_set(data, mask) g_assert_cmphex((data) & (mask), ==, (mask))
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#define assert_bit_clear(data, mask) g_assert_cmphex((data) & (mask), ==, 0)
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static QPCIBus *pcibus = NULL;
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static QGuestAllocator *guest_malloc;
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static char tmp_path[] = "/tmp/qtest.XXXXXX";
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static void ide_test_start(const char *cmdline_fmt, ...)
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@ -79,6 +113,7 @@ static void ide_test_start(const char *cmdline_fmt, ...)
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qtest_start(cmdline);
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qtest_irq_intercept_in(global_qtest, "ioapic");
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guest_malloc = pc_alloc_init();
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}
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static void ide_test_quit(void)
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@ -86,6 +121,188 @@ static void ide_test_quit(void)
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qtest_quit(global_qtest);
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}
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static QPCIDevice *get_pci_device(uint16_t *bmdma_base)
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{
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QPCIDevice *dev;
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uint16_t vendor_id, device_id;
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if (!pcibus) {
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pcibus = qpci_init_pc();
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}
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/* Find PCI device and verify it's the right one */
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dev = qpci_device_find(pcibus, QPCI_DEVFN(IDE_PCI_DEV, IDE_PCI_FUNC));
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g_assert(dev != NULL);
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vendor_id = qpci_config_readw(dev, PCI_VENDOR_ID);
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device_id = qpci_config_readw(dev, PCI_DEVICE_ID);
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g_assert(vendor_id == PCI_VENDOR_ID_INTEL);
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g_assert(device_id == PCI_DEVICE_ID_INTEL_82371SB_1);
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/* Map bmdma BAR */
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*bmdma_base = (uint16_t)(uintptr_t) qpci_iomap(dev, 4);
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qpci_device_enable(dev);
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return dev;
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}
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static void free_pci_device(QPCIDevice *dev)
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{
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/* libqos doesn't have a function for this, so free it manually */
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g_free(dev);
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}
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typedef struct PrdtEntry {
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uint32_t addr;
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uint32_t size;
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} QEMU_PACKED PrdtEntry;
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#define assert_bit_set(data, mask) g_assert_cmphex((data) & (mask), ==, (mask))
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#define assert_bit_clear(data, mask) g_assert_cmphex((data) & (mask), ==, 0)
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static int send_dma_request(int cmd, uint64_t sector, int nb_sectors,
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PrdtEntry *prdt, int prdt_entries)
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{
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QPCIDevice *dev;
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uint16_t bmdma_base;
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uintptr_t guest_prdt;
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size_t len;
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bool from_dev;
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uint8_t status;
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dev = get_pci_device(&bmdma_base);
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switch (cmd) {
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case CMD_READ_DMA:
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from_dev = true;
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break;
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case CMD_WRITE_DMA:
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from_dev = false;
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break;
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default:
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g_assert_not_reached();
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}
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/* Select device 0 */
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outb(IDE_BASE + reg_device, 0 | LBA);
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/* Stop any running transfer, clear any pending interrupt */
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outb(bmdma_base + bmreg_cmd, 0);
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outb(bmdma_base + bmreg_status, BM_STS_INTR);
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/* Setup PRDT */
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len = sizeof(*prdt) * prdt_entries;
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guest_prdt = guest_alloc(guest_malloc, len);
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memwrite(guest_prdt, prdt, len);
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outl(bmdma_base + bmreg_prdt, guest_prdt);
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/* ATA DMA command */
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outb(IDE_BASE + reg_nsectors, nb_sectors);
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outb(IDE_BASE + reg_lba_low, sector & 0xff);
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outb(IDE_BASE + reg_lba_middle, (sector >> 8) & 0xff);
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outb(IDE_BASE + reg_lba_high, (sector >> 16) & 0xff);
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outb(IDE_BASE + reg_command, cmd);
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/* Start DMA transfer */
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outb(bmdma_base + bmreg_cmd, BM_CMD_START | (from_dev ? BM_CMD_WRITE : 0));
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/* Wait for the DMA transfer to complete */
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do {
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status = inb(bmdma_base + bmreg_status);
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} while ((status & (BM_STS_ACTIVE | BM_STS_INTR)) == BM_STS_ACTIVE);
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g_assert_cmpint(get_irq(IDE_PRIMARY_IRQ), ==, !!(status & BM_STS_INTR));
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/* Check IDE status code */
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assert_bit_set(inb(IDE_BASE + reg_status), DRDY);
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assert_bit_clear(inb(IDE_BASE + reg_status), BSY | DRQ);
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/* Reading the status register clears the IRQ */
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g_assert(!get_irq(IDE_PRIMARY_IRQ));
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/* Stop DMA transfer if still active */
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if (status & BM_STS_ACTIVE) {
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outb(bmdma_base + bmreg_cmd, 0);
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}
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free_pci_device(dev);
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return status;
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}
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static void test_bmdma_simple_rw(void)
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{
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uint8_t status;
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uint8_t *buf;
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uint8_t *cmpbuf;
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size_t len = 512;
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uintptr_t guest_buf = guest_alloc(guest_malloc, len);
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PrdtEntry prdt[] = {
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{ .addr = guest_buf, .size = len | PRDT_EOT },
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};
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buf = g_malloc(len);
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cmpbuf = g_malloc(len);
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/* Write 0x55 pattern to sector 0 */
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memset(buf, 0x55, len);
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memwrite(guest_buf, buf, len);
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status = send_dma_request(CMD_WRITE_DMA, 0, 1, prdt, ARRAY_SIZE(prdt));
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g_assert_cmphex(status, ==, BM_STS_INTR);
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assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
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/* Write 0xaa pattern to sector 1 */
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memset(buf, 0xaa, len);
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memwrite(guest_buf, buf, len);
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status = send_dma_request(CMD_WRITE_DMA, 1, 1, prdt, ARRAY_SIZE(prdt));
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g_assert_cmphex(status, ==, BM_STS_INTR);
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assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
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/* Read and verify 0x55 pattern in sector 0 */
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memset(cmpbuf, 0x55, len);
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status = send_dma_request(CMD_READ_DMA, 0, 1, prdt, ARRAY_SIZE(prdt));
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g_assert_cmphex(status, ==, BM_STS_INTR);
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assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
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memread(guest_buf, buf, len);
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g_assert(memcmp(buf, cmpbuf, len) == 0);
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/* Read and verify 0xaa pattern in sector 1 */
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memset(cmpbuf, 0xaa, len);
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status = send_dma_request(CMD_READ_DMA, 1, 1, prdt, ARRAY_SIZE(prdt));
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g_assert_cmphex(status, ==, BM_STS_INTR);
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assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
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memread(guest_buf, buf, len);
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g_assert(memcmp(buf, cmpbuf, len) == 0);
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g_free(buf);
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g_free(cmpbuf);
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}
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static void test_bmdma_setup(void)
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{
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ide_test_start(
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"-vnc none "
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"-drive file=%s,if=ide,serial=%s,cache=writeback "
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"-global ide-hd.ver=%s",
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tmp_path, "testdisk", "version");
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}
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static void test_bmdma_teardown(void)
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{
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ide_test_quit();
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}
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static void test_identify(void)
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{
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uint8_t data;
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@ -156,6 +373,10 @@ int main(int argc, char **argv)
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qtest_add_func("/ide/identify", test_identify);
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qtest_add_func("/ide/bmdma/setup", test_bmdma_setup);
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qtest_add_func("/ide/bmdma/simple_rw", test_bmdma_simple_rw);
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qtest_add_func("/ide/bmdma/teardown", test_bmdma_teardown);
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ret = g_test_run();
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/* Cleanup */
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