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libqos/ahci: Add port_check_nonbusy helper

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A simple helper that asserts a given port is not busy processing any
commands via the TFD, Command Issue and SACT registers.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1423158090-25580-8-git-send-email-jsnow@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
John Snow 2015-02-05 12:41:18 -05:00 • committed by Stefan Hajnoczi
parent 5bf99aa1cf
commit 89a4672366
3 changed files with 20 additions and 0 deletions
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18
tests/libqos/ahci.c
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@ -347,6 +347,24 @@ void ahci_port_check_interrupts(AHCIQState *ahci, uint8_t port,
g_assert_cmphex(ahci_px_rreg(ahci, port, AHCI_PX_IS), ==, 0);
}
void ahci_port_check_nonbusy(AHCIQState *ahci, uint8_t port, uint8_t slot)
{
uint32_t reg;
/* Assert that the command slot is no longer busy (NCQ) */
reg = ahci_px_rreg(ahci, port, AHCI_PX_SACT);
ASSERT_BIT_CLEAR(reg, (1 << slot));
/* Non-NCQ */
reg = ahci_px_rreg(ahci, port, AHCI_PX_CI);
ASSERT_BIT_CLEAR(reg, (1 << slot));
/* And assert that we are generally not busy. */
reg = ahci_px_rreg(ahci, port, AHCI_PX_TFD);
ASSERT_BIT_CLEAR(reg, AHCI_PX_TFD_STS_BSY);
ASSERT_BIT_CLEAR(reg, AHCI_PX_TFD_STS_DRQ);
}
/* Get the command in #slot of port #port. */
void ahci_get_command_header(AHCIQState *ahci, uint8_t port,
uint8_t slot, AHCICommandHeader *cmd)