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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>
This commit is contained in:
Mika Westerberg 2017-10-02 13:38:38 +03:00 committed by David S. Miller
parent 3b3d9f4da9
commit 2a91ec63f8
2 changed files with 18 additions and 7 deletions
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7
drivers/thunderbolt/nhi_regs.h
View File

@ -17,13 +17,6 @@ enum ring_flags {
RING_FLAG_ENABLE = 1 << 31,
};
enum ring_desc_flags {
RING_DESC_ISOCH = 0x1, /* TX only? */
RING_DESC_COMPLETED = 0x2, /* set by NHI */
RING_DESC_POSTED = 0x4, /* always set this */
RING_DESC_INTERRUPT = 0x8, /* request an interrupt on completion */
};
/**
* struct ring_desc - TX/RX ring entry
*

18
include/linux/thunderbolt.h
View File

@ -478,6 +478,24 @@ struct tb_ring {
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