1 /* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
3 * Copyright(c) 2016 Intel Corporation.
6 #ifndef HFI1_SDMA_TXREQ_H
7 #define HFI1_SDMA_TXREQ_H
9 /* increased for AHG */
13 * struct sdma_desc - canonical fragment descriptor
15 * This is the descriptor carried in the tx request
16 * corresponding to each fragment.
20 /* private: don't use directly */
26 * struct sdma_txreq - the sdma_txreq structure (one per packet)
27 * @list: for use by user and by queuing for wait
29 * This is the representation of a packet which consists of some
30 * number of fragments. Storage is provided to within the structure.
33 * The storage for the descriptors are automatically extended as needed
34 * when the currently allocation is exceeded.
36 * The user (Verbs or PSM) may overload this structure with fields
37 * specific to their use by putting this struct first in their struct.
38 * The method of allocation of the overloaded structure is user dependent
40 * The list is the only public field in the structure.
44 #define SDMA_TXREQ_S_OK 0
45 #define SDMA_TXREQ_S_SENDERROR 1
46 #define SDMA_TXREQ_S_ABORTED 2
47 #define SDMA_TXREQ_S_SHUTDOWN 3
50 #define SDMA_TXREQ_F_URGENT 0x0001
51 #define SDMA_TXREQ_F_AHG_COPY 0x0002
52 #define SDMA_TXREQ_F_USE_AHG 0x0004
53 #define SDMA_TXREQ_F_VIP 0x0010
56 typedef void (*callback_t)(struct sdma_txreq *, int);
60 struct list_head list;
62 struct sdma_desc *descp;
69 #ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
72 /* private: - used in coalesce/pad processing */
74 /* private: - down-counted to trigger last */
87 struct sdma_desc descs[NUM_DESC];
90 static inline int sdma_txreq_built(struct sdma_txreq *tx)
95 #endif /* HFI1_SDMA_TXREQ_H */