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| author |   Mika Westerberg <mika.westerberg@linux.intel.com> | 2017-10-02 13:38:38 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-10-02 11:24:41 -0700 |
| commit | 2a91ec63f8a11e70d4b958dd4df867fec0247179 (patch) | |
| tree | 04cd5368d478553e855d39dff4da8316e9e05adc /include/linux/thunderbolt.h | |
| parent | thunderbolt: Export ring handling functions to modules (diff) | |
| download | wireguard-linux-2a91ec63f8a11e70d4b958dd4df867fec0247179.tar.xz wireguard-linux-2a91ec63f8a11e70d4b958dd4df867fec0247179.zip | |
thunderbolt: Move ring descriptor flags to thunderbolt.h
A Thunderbolt service driver might need to check if there was an error
with the descriptor when in frame mode. We also add two Rx specific
error flags RING_DESC_CRC_ERROR and RING_DESC_BUFFER_OVERRUN.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Michael Jamet <michael.jamet@intel.com>
Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/thunderbolt.h')
| -rw-r--r-- | include/linux/thunderbolt.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/thunderbolt.h b/include/linux/thunderbolt.h index 9ddb83ad890f..e3b9af7be0ad 100644 --- a/include/linux/thunderbolt.h +++ b/include/linux/thunderbolt.h @@ -479,6 +479,24 @@ struct ring_frame; typedef void (*ring_cb)(struct tb_ring *, struct ring_frame *, bool canceled); /** + * enum ring_desc_flags - Flags for DMA ring descriptor + * %RING_DESC_ISOCH: Enable isonchronous DMA (Tx only) + * %RING_DESC_CRC_ERROR: In frame mode CRC check failed for the frame (Rx only) + * %RING_DESC_COMPLETED: Descriptor completed (set by NHI) + * %RING_DESC_POSTED: Always set this + * %RING_DESC_BUFFER_OVERRUN: RX buffer overrun + * %RING_DESC_INTERRUPT: Request an interrupt on completion + */ +enum ring_desc_flags { + RING_DESC_ISOCH = 0x1, + RING_DESC_CRC_ERROR = 0x1, + RING_DESC_COMPLETED = 0x2, + RING_DESC_POSTED = 0x4, + RING_DESC_BUFFER_OVERRUN = 0x04, + RING_DESC_INTERRUPT = 0x8, +}; + +/** * struct ring_frame - For use with ring_rx/ring_tx * @buffer_phy: DMA mapped address of the frame * @callback: Callback called when the frame is finished |