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| author | John Snow <jsnow@redhat.com> | 2015-02-05 12:41:15 -0500 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2015-02-16 15:07:16 +0000 |
| commit | 6cae27a6af159ab44f7c265d7f22d9e95880db25 (patch) | |
| tree | 3235ddb2967e6ebf936fcb05b9925c236f069aa1 /module-common.c | |
| parent | c7f9c570b908a844aee393d93d01c332aea2a5a5 (diff) | |
| download | qemu-6cae27a6af159ab44f7c265d7f22d9e95880db25.tar.gz qemu-6cae27a6af159ab44f7c265d7f22d9e95880db25.tar.bz2 qemu-6cae27a6af159ab44f7c265d7f22d9e95880db25.zip | |
libqos/ahci: Add command header helpers
Adds command header helper functions:
-ahci_command_header_set
-ahci_command_header_get,
-ahci_command_destroy, and
-ahci_cmd_pick
These helpers help to quickly manage the command header information in
the AHCI device.
ahci_command_header_set and get will store or retrieve an AHCI command
header, respectively.
ahci_cmd_pick chooses the first available but least recently used
command slot to allow us to cycle through the available command slots.
ahci_command_destroy obliterates all information contained within a
given slot's command header, and frees its associated command table,
but not its DMA buffer!
Lastly, the command table pointer fields (dba and dbau) are merged into
a single 64bit value to make managing 64bit tests simpler.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1423158090-25580-5-git-send-email-jsnow@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'module-common.c')
0 files changed, 0 insertions, 0 deletions