[Qemu-devel] [PATCH 09/15] qtest/ahci: Add port_check_interrupts helper

[John Snow <jsnow@redhat.com>]

A helper that compares a given port's current
interrupts and checks them against a supplied
list of expected interrupt bits, and throws
an error if they do not match.

The helper then resets the requested interrupts
on this port, and asserts that the interrupt
register is now empty.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 tests/ahci-test.c | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

diff --git a/tests/ahci-test.c b/tests/ahci-test.c
index 4615681..315e6e9 100644
--- a/tests/ahci-test.c
+++ b/tests/ahci-test.c
@@ -1314,6 +1314,20 @@ static void port_check_error(AHCIState *ahci, uint8_t px)
     ASSERT_BIT_CLEAR(reg, AHCI_PX_TFD_ERR);
 }
 
+static void port_check_interrupts(AHCIState *ahci, uint8_t px,
+                                  uint32_t intr_mask)
+{
+    uint32_t reg;
+
+    /* Check for expected interrupts */
+    reg = PX_RREG(px, AHCI_PX_IS);
+    ASSERT_BIT_SET(reg, intr_mask);
+
+    /* Clear expected interrupts and assert all interrupts now cleared. */
+    PX_WREG(px, AHCI_PX_IS, intr_mask);
+    g_assert_cmphex(PX_RREG(px, AHCI_PX_IS), ==, 0);
+}
+
 /* Get the #cx'th command of port #px. */
 static void get_command_header(AHCIState *ahci, uint8_t px,
                                uint8_t cx, AHCICommand *cmd)
@@ -1562,18 +1576,10 @@ static void ahci_test_identify(AHCIState *ahci)
 
     /* Issue Command #cx via PxCI */
     issue_command(ahci, i, cx, 0);
+    /* Check registers for post-command consistency */
     port_check_error(ahci, i);
-
-    /* Check for expected interrupts */
-    reg = PX_RREG(i, AHCI_PX_IS);
-    ASSERT_BIT_SET(reg, AHCI_PX_IS_DHRS);
-    ASSERT_BIT_SET(reg, AHCI_PX_IS_PSS);
     /* BUG: we expect AHCI_PX_IS_DPS to be set. */
-    ASSERT_BIT_CLEAR(reg, AHCI_PX_IS_DPS);
-
-    /* Clear expected interrupts and assert all interrupts now cleared. */
-    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);
+    port_check_interrupts(ahci, i, AHCI_PX_IS_DHRS | AHCI_PX_IS_PSS);
 
     /* Investigate the CMD, assert that we read 512 bytes */
     get_command_header(ahci, i, cx, &cmd);
-- 
1.9.3