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 <stefa...@redhat.com>
Signed-off-by: John Snow <js...@redhat.com>
---
tests/ahci-test.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
diff --git a/tests/ahci-test.c b/tests/ahci-test.c
index f595b96..53fd068 100644
--- a/tests/ahci-test.c
+++ b/tests/ahci-test.c
@@ -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();
--
1.9.3
