1 /* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */ 2 /* 3 * Copyright(c) 2016 Intel Corporation. 4 */ 5 6 #ifndef HFI1_SDMA_TXREQ_H 7 #define HFI1_SDMA_TXREQ_H 8 9 /* increased for AHG */ 10 #define NUM_DESC 6 11 12 /* 13 * struct sdma_desc - canonical fragment descriptor 14 * 15 * This is the descriptor carried in the tx request 16 * corresponding to each fragment. 17 * 18 */ 19 struct sdma_desc { 20 /* private: don't use directly */ 21 u64 qw[2]; 22 void *pinning_ctx; 23 /* Release reference to @pinning_ctx. May be called in interrupt context. Must not sleep. */ 24 void (*ctx_put)(void *ctx); 25 }; 26 27 /** 28 * struct sdma_txreq - the sdma_txreq structure (one per packet) 29 * @list: for use by user and by queuing for wait 30 * 31 * This is the representation of a packet which consists of some 32 * number of fragments. Storage is provided to within the structure. 33 * for all fragments. 34 * 35 * The storage for the descriptors are automatically extended as needed 36 * when the currently allocation is exceeded. 37 * 38 * The user (Verbs or PSM) may overload this structure with fields 39 * specific to their use by putting this struct first in their struct. 40 * The method of allocation of the overloaded structure is user dependent 41 * 42 * The list is the only public field in the structure. 43 * 44 */ 45 46 #define SDMA_TXREQ_S_OK 0 47 #define SDMA_TXREQ_S_SENDERROR 1 48 #define SDMA_TXREQ_S_ABORTED 2 49 #define SDMA_TXREQ_S_SHUTDOWN 3 50 51 /* flags bits */ 52 #define SDMA_TXREQ_F_URGENT 0x0001 53 #define SDMA_TXREQ_F_AHG_COPY 0x0002 54 #define SDMA_TXREQ_F_USE_AHG 0x0004 55 #define SDMA_TXREQ_F_VIP 0x0010 56 57 struct sdma_txreq; 58 typedef void (*callback_t)(struct sdma_txreq *, int); 59 60 struct iowait; 61 struct sdma_txreq { 62 struct list_head list; 63 /* private: */ 64 struct sdma_desc *descp; 65 /* private: */ 66 void *coalesce_buf; 67 /* private: */ 68 struct iowait *wait; 69 /* private: */ 70 callback_t complete; 71 #ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER 72 u64 sn; 73 #endif 74 /* private: - used in coalesce/pad processing */ 75 u16 packet_len; 76 /* private: - down-counted to trigger last */ 77 u16 tlen; 78 /* private: */ 79 u16 num_desc; 80 /* private: */ 81 u16 desc_limit; 82 /* private: */ 83 u16 next_descq_idx; 84 /* private: */ 85 u16 coalesce_idx; 86 /* private: flags */ 87 u16 flags; 88 /* private: */ 89 struct sdma_desc descs[NUM_DESC]; 90 }; 91 sdma_txreq_built(struct sdma_txreq * tx)92static inline int sdma_txreq_built(struct sdma_txreq *tx) 93 { 94 return tx->num_desc; 95 } 96 97 #endif /* HFI1_SDMA_TXREQ_H */ 98