[Qemu-devel] [PATCH 07/15] qtest/ahci: Add port_check_error helper

[John Snow <jsnow@redhat.com>]

port_check-error checks a given port's error registers
and asserts that everything from the port-level view
is still OK.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 tests/ahci-test.c | 30 +++++++++++++++++++++++-------
 1 file changed, 23 insertions(+), 7 deletions(-)

diff --git a/tests/ahci-test.c b/tests/ahci-test.c
index 3e65435..fcf5ffb 100644
--- a/tests/ahci-test.c
+++ b/tests/ahci-test.c
@@ -1292,6 +1292,28 @@ static void port_clear(AHCIState *ahci, uint8_t px)
     qmemset(ahci->port[px].fb, 0x00, 0x100);
 }
 
+/**
+ * Check a port for errors.
+ */
+static void port_check_error(AHCIState *ahci, uint8_t px)
+{
+    uint32_t reg;
+
+    /* The upper 9 bits of the IS register all indicate errors. */
+    reg = PX_RREG(px, AHCI_PX_IS);
+    reg >>= 23;
+    g_assert_cmphex(reg, ==, 0);
+
+    /* The Sata Error Register should be empty. */
+    reg = PX_RREG(px, AHCI_PX_SERR);
+    g_assert_cmphex(reg, ==, 0);
+
+    /* The TFD also has two error sections. */
+    reg = PX_RREG(px, AHCI_PX_TFD);
+    ASSERT_BIT_CLEAR(reg, AHCI_PX_TFD_STS_ERR);
+    ASSERT_BIT_CLEAR(reg, AHCI_PX_TFD_ERR);
+}
+
 /* Get the #cx'th command of port #px. */
 static void get_command_header(AHCIState *ahci, uint8_t px,
                                uint8_t cx, AHCICommand *cmd)
@@ -1523,6 +1545,7 @@ static void ahci_test_identify(AHCIState *ahci)
     while (BITSET(PX_RREG(i, AHCI_PX_TFD), AHCI_PX_TFD_STS_BSY)) {
         usleep(50);
     }
+    port_check_error(ahci, i);
 
     /* Check for expected interrupts */
     reg = PX_RREG(i, AHCI_PX_IS);
@@ -1535,13 +1558,6 @@ static void ahci_test_identify(AHCIState *ahci)
     PX_WREG(i, AHCI_PX_IS, AHCI_PX_IS_DHRS | AHCI_PX_IS_PSS | AHCI_PX_IS_DPS);
     g_assert_cmphex(PX_RREG(i, AHCI_PX_IS), ==, 0);
 
-    /* Check for errors. */
-    reg = PX_RREG(i, AHCI_PX_SERR);
-    g_assert_cmphex(reg, ==, 0);
-    reg = PX_RREG(i, AHCI_PX_TFD);
-    ASSERT_BIT_CLEAR(reg, AHCI_PX_TFD_STS_ERR);
-    ASSERT_BIT_CLEAR(reg, AHCI_PX_TFD_ERR);
-
     /* Investigate the CMD, assert that we read 512 bytes */
     get_command_header(ahci, i, cx, &cmd);
     g_assert_cmphex(512, ==, cmd.prdbc);
-- 
1.9.3