| /* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */ |
| /* |
| * Copyright(c) 2016 Intel Corporation. |
| */ |
| |
| #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]; |
| }; |
| |
| /** |
| * 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 */ |