Commit b95739dc authored by Kevin Wolf's avatar Kevin Wolf
Browse files

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: default avatarKevin Wolf <kwolf@redhat.com>
parent acbe4801

tests/ide-test.c

+221 −0
Original line number Diff line number Diff line
@@ -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 */