[Qemu-devel] [PATCH v2 5/8] qtest/ahci: Add PIO and LBA48 tests

[John Snow <jsnow@redhat.com>]

In addition to DMA tests, test PIO and LBA48 command pathways in AHCI.
To accomplish this, a primitive multiplexer for gtest is added.

Though guests may prefer not to issue PIO commands directly except
for single sector cases during early boot and shutdown, these pathways
are still used for the transfer of ATAPI commands as well, and should
be behaving well.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 tests/ahci-test.c | 156 ++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 134 insertions(+), 22 deletions(-)

diff --git a/tests/ahci-test.c b/tests/ahci-test.c
index 9394d85..21f20f7 100644
--- a/tests/ahci-test.c
+++ b/tests/ahci-test.c
@@ -731,7 +731,8 @@ static void ahci_test_identify(AHCIQState *ahci)
     g_assert_cmphex(sect_size, ==, 0x200);
 }
 
-static void ahci_test_dma_rw_simple(AHCIQState *ahci, unsigned bufsize)
+static void ahci_test_io_rw_simple(AHCIQState *ahci, unsigned bufsize,
+                                   uint8_t read_cmd, uint8_t write_cmd)
 {
     uint64_t ptr;
     uint8_t port;
@@ -757,9 +758,9 @@ static void ahci_test_dma_rw_simple(AHCIQState *ahci, unsigned bufsize)
     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);
+    ahci_guest_io(ahci, port, write_cmd, ptr, bufsize);
     qmemset(ptr, 0x00, bufsize);
-    ahci_guest_io(ahci, port, CMD_READ_DMA, ptr, bufsize);
+    ahci_guest_io(ahci, port, read_cmd, ptr, bufsize);
 
     /*** Read back the Data ***/
     memread(ptr, rx, bufsize);
@@ -850,36 +851,142 @@ static void test_identify(void)
     ahci_shutdown(ahci);
 }
 
+/******************************************************************************/
+/* AHCI I/O Test Matrix Definitions                                           */
+
+enum BuffLen {
+    LEN_BEGIN = 0,
+    LEN_SIMPLE = LEN_BEGIN,
+    LEN_DOUBLE,
+    LEN_LONG,
+    LEN_SHORT,
+    NUM_LENGTHS
+};
+
+static const char *buff_len_str[NUM_LENGTHS] = { "simple", "double",
+                                                 "long", "short" };
+
+enum AddrMode {
+    ADDR_MODE_BEGIN = 0,
+    ADDR_MODE_LBA28 = ADDR_MODE_BEGIN,
+    ADDR_MODE_LBA48,
+    NUM_ADDR_MODES
+};
+
+static const char *addr_mode_str[NUM_ADDR_MODES] = { "lba28", "lba48" };
+
+enum IOMode {
+    MODE_BEGIN = 0,
+    MODE_PIO = MODE_BEGIN,
+    MODE_DMA,
+    NUM_MODES
+};
+
+static const char *io_mode_str[NUM_MODES] = { "pio", "dma" };
+
+enum IOOps {
+    IO_BEGIN = 0,
+    IO_READ = IO_BEGIN,
+    IO_WRITE,
+    NUM_IO_OPS
+};
+
+typedef struct AHCIIOTestOptions {
+    enum BuffLen length;
+    enum AddrMode address_type;
+    enum IOMode io_type;
+} AHCIIOTestOptions;
+
 /**
- * Perform a simple DMA R/W test using non-NCQ commands.
+ * Table of possible I/O ATA commands given a set of enumerations.
  */
-static void test_dma_rw_interface(unsigned bufsize)
+static const uint8_t io_cmds[NUM_MODES][NUM_ADDR_MODES][NUM_IO_OPS] = {
+    [MODE_PIO] = {
+        [ADDR_MODE_LBA28] = {
+            [IO_READ] = CMD_READ_PIO,
+            [IO_WRITE] = CMD_WRITE_PIO },
+        [ADDR_MODE_LBA48] = {
+            [IO_READ] = CMD_READ_PIO_EXT,
+            [IO_WRITE] = CMD_WRITE_PIO_EXT }
+    },
+    [MODE_DMA] = {
+        [ADDR_MODE_LBA28] = {
+            [IO_READ] = CMD_READ_DMA,
+            [IO_WRITE] = CMD_WRITE_DMA },
+        [ADDR_MODE_LBA48] = {
+            [IO_READ] = CMD_READ_DMA_EXT,
+            [IO_WRITE] = CMD_WRITE_DMA_EXT }
+    }
+};
+
+/**
+ * Test a Read/Write pattern using various commands, addressing modes,
+ * transfer modes, and buffer sizes.
+ */
+static void test_io_rw_interface(enum AddrMode lba48, enum IOMode dma,
+                                 unsigned bufsize)
 {
     AHCIQState *ahci;
 
     ahci = ahci_boot_and_enable();
-    ahci_test_dma_rw_simple(ahci, bufsize);
+    ahci_test_io_rw_simple(ahci, bufsize,
+                           io_cmds[dma][lba48][IO_READ],
+                           io_cmds[dma][lba48][IO_WRITE]);
     ahci_shutdown(ahci);
 }
 
-static void test_dma_rw_simple(void)
+/**
+ * Demultiplex the test data and invoke the actual test routine.
+ */
+static void test_io_interface(gconstpointer opaque)
 {
-    test_dma_rw_interface(4096);
-}
+    AHCIIOTestOptions *opts = (AHCIIOTestOptions *)opaque;
+    unsigned bufsize;
 
-static void test_dma_rw_double(void)
-{
-    test_dma_rw_interface(8192);
-}
+    switch (opts->length) {
+    case LEN_SIMPLE:
+        bufsize = 4096;
+        break;
+    case LEN_DOUBLE:
+        bufsize = 8192;
+        break;
+    case LEN_LONG:
+        bufsize = 4096 * 64;
+        break;
+    case LEN_SHORT:
+        bufsize = 512;
+        break;
+    default:
+        g_assert_not_reached();
+    }
 
-static void test_dma_rw_long(void)
-{
-    test_dma_rw_interface(4096 * 64);
+    test_io_rw_interface(opts->address_type, opts->io_type, bufsize);
+    g_free(opts);
+    return;
 }
 
-static void test_dma_rw_short(void)
+static void create_ahci_io_test(enum IOMode type, enum AddrMode addr,
+                                enum BuffLen len)
 {
-    test_dma_rw_interface(512);
+    static const char *arch;
+    char *name;
+    AHCIIOTestOptions *opts = g_malloc(sizeof(AHCIIOTestOptions));
+
+    opts->length = len;
+    opts->address_type = addr;
+    opts->io_type = type;
+
+    if (!arch) {
+        arch = qtest_get_arch();
+    }
+
+    name = g_strdup_printf("/%s/ahci/io/%s/%s/%s", arch,
+                           io_mode_str[type],
+                           addr_mode_str[addr],
+                           buff_len_str[len]);
+
+    g_test_add_data_func(name, opts, test_io_interface);
+    g_free(name);
 }
 
 /******************************************************************************/
@@ -890,6 +997,7 @@ int main(int argc, char **argv)
     int fd;
     int ret;
     int c;
+    int i, j, k;
 
     static struct option long_options[] = {
         {"pedantic", no_argument, 0, 'p' },
@@ -937,10 +1045,14 @@ 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);
-    qtest_add_func("/ahci/dma/double", test_dma_rw_double);
-    qtest_add_func("/ahci/dma/long",   test_dma_rw_long);
-    qtest_add_func("/ahci/dma/short",  test_dma_rw_short);
+
+    for (i = MODE_BEGIN; i < NUM_MODES; i++) {
+        for (j = ADDR_MODE_BEGIN; j < NUM_ADDR_MODES; j++) {
+            for (k = LEN_BEGIN; k < NUM_LENGTHS; k++) {
+                create_ahci_io_test(i, j, k);
+            }
+        }
+    }
 
     ret = g_test_run();
 
-- 
1.9.3