diff options
| -rw-r--r-- | tests/ahci-test.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/tests/ahci-test.c b/tests/ahci-test.c index 21f20f7002..cf0b98b962 100644 --- a/tests/ahci-test.c +++ b/tests/ahci-test.c @@ -851,6 +851,63 @@ static void test_identify(void) ahci_shutdown(ahci); } +/** + * Fragmented DMA test: Perform a standard 4K DMA read/write + * test, but make sure the physical regions are fragmented to + * be very small, each just 32 bytes, to see how AHCI performs + * with chunks defined to be much less than a sector. + */ +static void test_dma_fragmented(void) +{ + AHCIQState *ahci; + AHCICommand *cmd; + uint8_t px; + size_t bufsize = 4096; + unsigned char *tx = g_malloc(bufsize); + unsigned char *rx = g_malloc0(bufsize); + unsigned i; + uint64_t ptr; + + ahci = ahci_boot_and_enable(); + px = ahci_port_select(ahci); + ahci_port_clear(ahci, px); + + /* create pattern */ + for (i = 0; i < bufsize; i++) { + tx[i] = (bufsize - i); + } + + /* Create a DMA buffer in guest memory, and write our pattern to it. */ + ptr = guest_alloc(ahci->parent->alloc, bufsize); + g_assert(ptr); + memwrite(ptr, tx, bufsize); + + cmd = ahci_command_create(CMD_WRITE_DMA); + ahci_command_adjust(cmd, 0, ptr, bufsize, 32); + ahci_command_commit(ahci, cmd, px); + ahci_command_issue(ahci, cmd); + ahci_command_verify(ahci, cmd); + g_free(cmd); + + cmd = ahci_command_create(CMD_READ_DMA); + ahci_command_adjust(cmd, 0, ptr, bufsize, 32); + ahci_command_commit(ahci, cmd, px); + ahci_command_issue(ahci, cmd); + ahci_command_verify(ahci, cmd); + g_free(cmd); + + /* Read back the guest's receive buffer into local memory */ + memread(ptr, rx, bufsize); + guest_free(ahci->parent->alloc, ptr); + + g_assert_cmphex(memcmp(tx, rx, bufsize), ==, 0); + + ahci_shutdown(ahci); + + g_free(rx); + g_free(tx); +} + /******************************************************************************/ /* AHCI I/O Test Matrix Definitions */ @@ -1054,6 +1111,8 @@ int main(int argc, char **argv) } } + qtest_add_func("/ahci/io/dma/lba28/fragmented", test_dma_fragmented); + ret = g_test_run(); /* Cleanup */ |