diff options
| author | Jack Morgenstein <jackm@mellanox.co.il> | 2006-03-04 08:54:13 +0300 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-03-20 21:08:23 +0300 |
| commit | f36e1793e25513380cae5958a9164d4cc4458ad0 (patch) | |
| tree | aa31d34ee07971645af6f21068709166420caee2 /drivers/infiniband/core/mad_priv.h | |
| parent | 6ecb0c849625e830ab96495d473bb704812c30e1 (diff) | |
| download | linux-f36e1793e25513380cae5958a9164d4cc4458ad0.tar.xz | |
IB/umad: Add support for large RMPP transfers
Add support for sending and receiving large RMPP transfers. The old
code supports transfers only as large as a single contiguous kernel
memory allocation. This patch uses linked list of memory buffers when
sending and receiving data to avoid needing contiguous pages for
larger transfers.
Receive side: copy the arriving MADs in chunks instead of coalescing
to one large buffer in kernel space.
Send side: split a multipacket MAD buffer to a list of segments,
(multipacket_list) and send these using a gather list of size 2.
Also, save pointer to last sent segment, and retrieve requested
segments by walking list starting at last sent segment. Finally,
save pointer to last-acked segment. When retrying, retrieve
segments for resending relative to this pointer. When updating last
ack, start at this pointer.
Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/core/mad_priv.h')
| -rw-r--r-- | drivers/infiniband/core/mad_priv.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/infiniband/core/mad_priv.h b/drivers/infiniband/core/mad_priv.h index 570f78682af3..a7125d4b5ccf 100644 --- a/drivers/infiniband/core/mad_priv.h +++ b/drivers/infiniband/core/mad_priv.h @@ -31,7 +31,7 @@ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * - * $Id: mad_priv.h 2730 2005-06-28 16:43:03Z sean.hefty $ + * $Id: mad_priv.h 5596 2006-03-03 01:00:07Z sean.hefty $ */ #ifndef __IB_MAD_PRIV_H__ @@ -85,6 +85,12 @@ struct ib_mad_private { } mad; } __attribute__ ((packed)); +struct ib_rmpp_segment { + struct list_head list; + u32 num; + u8 data[0]; +}; + struct ib_mad_agent_private { struct list_head agent_list; struct ib_mad_agent agent; @@ -119,7 +125,8 @@ struct ib_mad_send_wr_private { struct list_head agent_list; struct ib_mad_agent_private *mad_agent_priv; struct ib_mad_send_buf send_buf; - DECLARE_PCI_UNMAP_ADDR(mapping) + DECLARE_PCI_UNMAP_ADDR(header_mapping) + DECLARE_PCI_UNMAP_ADDR(payload_mapping) struct ib_send_wr send_wr; struct ib_sge sg_list[IB_MAD_SEND_REQ_MAX_SG]; __be64 tid; @@ -130,11 +137,12 @@ struct ib_mad_send_wr_private { enum ib_wc_status status; /* RMPP control */ + struct list_head rmpp_list; + struct ib_rmpp_segment *last_ack_seg; + struct ib_rmpp_segment *cur_seg; int last_ack; int seg_num; int newwin; - int total_seg; - int data_offset; int pad; }; |