From 81705ee4850b55ef4879c941e4a7703efd3cb760 Mon Sep 17 00:00:00 2001 From: John Snow Date: Thu, 5 Feb 2015 12:41:30 -0500 Subject: [PATCH] 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 Signed-off-by: John Snow Message-id: 1423158090-25580-20-git-send-email-jsnow@redhat.com Signed-off-by: Stefan Hajnoczi --- tests/ahci-test.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/tests/ahci-test.c b/tests/ahci-test.c index f595b96a94..53fd068c8a 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(); -- 2.11.4.GIT