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libqos/ahci: edit wait to be ncq aware 

The wait command should check to make sure SACT is clear as well
as the Command Issue register.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1435016308-6150-12-git-send-email-jsnow@redhat.com
This commit is contained in:
John Snow 2015-07-04 02:06:03 -04:00
parent cb45304108
commit 4de484698b
1 changed files with 7 additions and 3 deletions
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10
tests/libqos/ahci.c
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@ -908,11 +908,15 @@ void ahci_command_wait(AHCIQState *ahci, AHCICommand *cmd)
/* We can't rely on STS_BSY until the command has started processing.
* Therefore, we also use the Command Issue bit as indication of
* a command in-flight. */
while (BITSET(ahci_px_rreg(ahci, cmd->port, AHCI_PX_TFD),
AHCI_PX_TFD_STS_BSY) ||
BITSET(ahci_px_rreg(ahci, cmd->port, AHCI_PX_CI), (1 << cmd->slot))) {
#define RSET(REG, MASK) (BITSET(ahci_px_rreg(ahci, cmd->port, (REG)), (MASK)))
while (RSET(AHCI_PX_TFD, AHCI_PX_TFD_STS_BSY) ||
RSET(AHCI_PX_CI, 1 << cmd->slot) ||
(cmd->props->ncq && RSET(AHCI_PX_SACT, 1 << cmd->slot))) {
usleep(50);
}
}
void ahci_command_issue(AHCIQState *ahci, AHCICommand *cmd)