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qtest/ahci: Adding simple dma read-write test 

Adds a test case for AHCI wherein we write a 4K
block of a changing pattern to sector 0, then
read back that 4K and compare the transmit and
receive buffers.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1423158090-25580-20-git-send-email-jsnow@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
John Snow 2015-02-05 12:41:30 -05:00 committed by Stefan Hajnoczi
parent 122482a398
commit 81705ee485
1 changed files with 55 additions and 0 deletions
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55
tests/ahci-test.c
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@ -716,6 +716,46 @@ static void ahci_test_identify(AHCIQState *ahci)
g_assert_cmphex(sect_size, ==, 0x200);
}
static void ahci_test_dma_rw_simple(AHCIQState *ahci)
{
uint64_t ptr;
uint8_t port;
unsigned i;
const unsigned bufsize = 4096;
unsigned char *tx = g_malloc(bufsize);
unsigned char *rx = g_malloc0(bufsize);
g_assert(ahci != NULL);
/* Pick the first running port and clear it. */
port = ahci_port_select(ahci);
ahci_port_clear(ahci, port);
/*** Create pattern and transfer to guest ***/
/* Data buffer in the guest */
ptr = ahci_alloc(ahci, bufsize);
g_assert(ptr);
/* Write some indicative pattern to our 4K buffer. */
for (i = 0; i < bufsize; i++) {
tx[i] = (bufsize - i);
}
memwrite(ptr, tx, bufsize);
/* Write this buffer to disk, then read it back to the DMA buffer. */
ahci_guest_io(ahci, port, CMD_WRITE_DMA, ptr, bufsize);
qmemset(ptr, 0x00, bufsize);
ahci_guest_io(ahci, port, CMD_READ_DMA, ptr, bufsize);
/*** Read back the Data ***/
memread(ptr, rx, bufsize);
g_assert_cmphex(memcmp(tx, rx, bufsize), ==, 0);
ahci_free(ahci, ptr);
g_free(tx);
g_free(rx);
}
/******************************************************************************/
/* Test Interfaces */
/******************************************************************************/
@ -798,6 +838,20 @@ static void test_identify(void)
ahci_shutdown(ahci);
}
/**
* Perform a simple DMA R/W test, using a single PRD and non-NCQ commands.
*/
static void test_dma_rw_simple(void)
{
AHCIQState *ahci;
ahci = ahci_boot();
ahci_pci_enable(ahci);
ahci_hba_enable(ahci);
ahci_test_dma_rw_simple(ahci);
ahci_shutdown(ahci);
}
/******************************************************************************/
int main(int argc, char **argv)
@ -853,6 +907,7 @@ int main(int argc, char **argv)
qtest_add_func("/ahci/hba_spec", test_hba_spec);
qtest_add_func("/ahci/hba_enable", test_hba_enable);
qtest_add_func("/ahci/identify", test_identify);
qtest_add_func("/ahci/dma/simple", test_dma_rw_simple);
ret = g_test_run();