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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>
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@ -716,6 +716,46 @@ static void ahci_test_identify(AHCIQState *ahci)
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g_assert_cmphex(sect_size, ==, 0x200);
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}
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static void ahci_test_dma_rw_simple(AHCIQState *ahci)
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{
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uint64_t ptr;
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uint8_t port;
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unsigned i;
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const unsigned bufsize = 4096;
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unsigned char *tx = g_malloc(bufsize);
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unsigned char *rx = g_malloc0(bufsize);
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g_assert(ahci != NULL);
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/* Pick the first running port and clear it. */
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port = ahci_port_select(ahci);
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ahci_port_clear(ahci, port);
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/*** Create pattern and transfer to guest ***/
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/* Data buffer in the guest */
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ptr = ahci_alloc(ahci, bufsize);
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g_assert(ptr);
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/* Write some indicative pattern to our 4K buffer. */
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for (i = 0; i < bufsize; i++) {
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tx[i] = (bufsize - i);
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}
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memwrite(ptr, tx, bufsize);
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/* Write this buffer to disk, then read it back to the DMA buffer. */
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ahci_guest_io(ahci, port, CMD_WRITE_DMA, ptr, bufsize);
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qmemset(ptr, 0x00, bufsize);
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ahci_guest_io(ahci, port, CMD_READ_DMA, ptr, bufsize);
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/*** Read back the Data ***/
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memread(ptr, rx, bufsize);
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g_assert_cmphex(memcmp(tx, rx, bufsize), ==, 0);
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ahci_free(ahci, ptr);
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g_free(tx);
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g_free(rx);
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}
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/******************************************************************************/
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/* Test Interfaces */
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/******************************************************************************/
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@ -798,6 +838,20 @@ static void test_identify(void)
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ahci_shutdown(ahci);
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}
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/**
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* Perform a simple DMA R/W test, using a single PRD and non-NCQ commands.
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*/
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static void test_dma_rw_simple(void)
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{
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AHCIQState *ahci;
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ahci = ahci_boot();
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ahci_pci_enable(ahci);
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ahci_hba_enable(ahci);
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ahci_test_dma_rw_simple(ahci);
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ahci_shutdown(ahci);
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}
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/******************************************************************************/
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int main(int argc, char **argv)
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@ -853,6 +907,7 @@ int main(int argc, char **argv)
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qtest_add_func("/ahci/hba_spec", test_hba_spec);
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qtest_add_func("/ahci/hba_enable", test_hba_enable);
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qtest_add_func("/ahci/identify", test_identify);
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qtest_add_func("/ahci/dma/simple", test_dma_rw_simple);
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ret = g_test_run();
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