/* 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 */