From e83fd96bfab90298beaa8c8a31e48a905564180e Mon Sep 17 00:00:00 2001 From: John Snow Date: Thu, 5 Feb 2015 12:41:13 -0500 Subject: [PATCH] libqos/ahci: Add ahci_port_clear helper Add a helper that assists in clearing out potentially old error and FIS information from an AHCI port's data structures. This ensures we always start with a blank slate for interrupt and FIS receipt information. Signed-off-by: John Snow Reviewed-by: Paolo Bonzini Message-id: 1423158090-25580-3-git-send-email-jsnow@redhat.com Signed-off-by: Stefan Hajnoczi --- tests/ahci-test.c | 9 ++------- tests/libqos/ahci.c | 16 ++++++++++++++++ tests/libqos/ahci.h | 1 + 3 files changed, 19 insertions(+), 7 deletions(-) diff --git a/tests/ahci-test.c b/tests/ahci-test.c index c689b62fc0..90647f2a0c 100644 --- a/tests/ahci-test.c +++ b/tests/ahci-test.c @@ -687,13 +687,8 @@ static void ahci_test_identify(AHCIQState *ahci) i = ahci_port_select(ahci); g_test_message("Selected port %u for test", i); - /* Clear out this port's interrupts (ignore the init register d2h fis) */ - reg = ahci_px_rreg(ahci, i, AHCI_PX_IS); - ahci_px_wreg(ahci, i, AHCI_PX_IS, reg); - g_assert_cmphex(ahci_px_rreg(ahci, i, AHCI_PX_IS), ==, 0); - - /* Wipe the FIS-Receive Buffer */ - qmemset(ahci->port[i].fb, 0x00, 0x100); + /* Clear out the FIS Receive area and any pending interrupts. */ + ahci_port_clear(ahci, i); /* Create a Command Table buffer. 0x80 is the smallest with a PRDTL of 0. */ /* We need at least one PRD, so round up to the nearest 0x80 multiple. */ diff --git a/tests/libqos/ahci.c b/tests/libqos/ahci.c index 7ea55f90b7..3b1b9ba499 100644 --- a/tests/libqos/ahci.c +++ b/tests/libqos/ahci.c @@ -294,3 +294,19 @@ unsigned ahci_port_select(AHCIQState *ahci) g_assert(i < 32); return i; } + +/** + * Clear a port's interrupts and status information prior to a test. + */ +void ahci_port_clear(AHCIQState *ahci, uint8_t port) +{ + uint32_t reg; + + /* Clear out this port's interrupts (ignore the init register d2h fis) */ + reg = ahci_px_rreg(ahci, port, AHCI_PX_IS); + ahci_px_wreg(ahci, port, AHCI_PX_IS, reg); + g_assert_cmphex(ahci_px_rreg(ahci, port, AHCI_PX_IS), ==, 0); + + /* Wipe the FIS-Recieve Buffer */ + qmemset(ahci->port[port].fb, 0x00, 0x100); +} diff --git a/tests/libqos/ahci.h b/tests/libqos/ahci.h index b3992e19e5..39ba94e3f4 100644 --- a/tests/libqos/ahci.h +++ b/tests/libqos/ahci.h @@ -432,5 +432,6 @@ void ahci_pci_enable(AHCIQState *ahci); void start_ahci_device(AHCIQState *ahci); void ahci_hba_enable(AHCIQState *ahci); unsigned ahci_port_select(AHCIQState *ahci); +void ahci_port_clear(AHCIQState *ahci, uint8_t port); #endif