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Diffstat (limited to '')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/sdma_txreq.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/sdma_txreq.h b/drivers/infiniband/hw/hfi1/sdma_txreq.h new file mode 100644 index 000000000..fb091b583 --- /dev/null +++ b/drivers/infiniband/hw/hfi1/sdma_txreq.h @@ -0,0 +1,139 @@ +/* + * Copyright(c) 2016 Intel Corporation. + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * BSD LICENSE + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * - Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef HFI1_SDMA_TXREQ_H +#define HFI1_SDMA_TXREQ_H + +/* increased for AHG */ +#define NUM_DESC 6 + +/* + * struct sdma_desc - canonical fragment descriptor + * + * This is the descriptor carried in the tx request + * corresponding to each fragment. + * + */ +struct sdma_desc { + /* private: don't use directly */ + u64 qw[2]; + void *pinning_ctx; + /* Release reference to @pinning_ctx. May be called in interrupt context. Must not sleep. */ + void (*ctx_put)(void *ctx); +}; + +/** + * struct sdma_txreq - the sdma_txreq structure (one per packet) + * @list: for use by user and by queuing for wait + * + * This is the representation of a packet which consists of some + * number of fragments. Storage is provided to within the structure. + * for all fragments. + * + * The storage for the descriptors are automatically extended as needed + * when the currently allocation is exceeded. + * + * The user (Verbs or PSM) may overload this structure with fields + * specific to their use by putting this struct first in their struct. + * The method of allocation of the overloaded structure is user dependent + * + * The list is the only public field in the structure. + * + */ + +#define SDMA_TXREQ_S_OK 0 +#define SDMA_TXREQ_S_SENDERROR 1 +#define SDMA_TXREQ_S_ABORTED 2 +#define SDMA_TXREQ_S_SHUTDOWN 3 + +/* flags bits */ +#define SDMA_TXREQ_F_URGENT 0x0001 +#define SDMA_TXREQ_F_AHG_COPY 0x0002 +#define SDMA_TXREQ_F_USE_AHG 0x0004 +#define SDMA_TXREQ_F_VIP 0x0010 + +struct sdma_txreq; +typedef void (*callback_t)(struct sdma_txreq *, int); + +struct iowait; +struct sdma_txreq { + struct list_head list; + /* private: */ + struct sdma_desc *descp; + /* private: */ + void *coalesce_buf; + /* private: */ + struct iowait *wait; + /* private: */ + callback_t complete; +#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER + u64 sn; +#endif + /* private: - used in coalesce/pad processing */ + u16 packet_len; + /* private: - down-counted to trigger last */ + u16 tlen; + /* private: */ + u16 num_desc; + /* private: */ + u16 desc_limit; + /* private: */ + u16 next_descq_idx; + /* private: */ + u16 coalesce_idx; + /* private: flags */ + u16 flags; + /* private: */ + struct sdma_desc descs[NUM_DESC]; +}; + +static inline int sdma_txreq_built(struct sdma_txreq *tx) +{ + return tx->num_desc; +} + +#endif /* HFI1_SDMA_TXREQ_H */ |