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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Internal Shared Memory
4 *
5 * Definitions for the ISM module
6 *
7 * Copyright IBM Corp. 2022
8 */
9#ifndef _ISM_H
10#define _ISM_H
11
12#include <linux/workqueue.h>
13
14/* Unless we gain unexpected popularity, this limit should hold for a while */
15#define MAX_CLIENTS 8
16#define ISM_NR_DMBS 1920
17
18struct ism_dev {
19 spinlock_t lock; /* protects the ism device */
20 spinlock_t cmd_lock; /* serializes cmds */
21 struct list_head list;
22 struct dibs_dev *dibs;
23 struct pci_dev *pdev;
24
25 struct ism_sba *sba;
26 dma_addr_t sba_dma_addr;
27 DECLARE_BITMAP(sba_bitmap, ISM_NR_DMBS);
28 void *priv[MAX_CLIENTS];
29
30 struct ism_eq *ieq;
31 dma_addr_t ieq_dma_addr;
32
33 int ieq_idx;
34
35 struct ism_client *subs[MAX_CLIENTS];
36};
37
38struct ism_event {
39 u32 type;
40 u32 code;
41 u64 tok;
42 u64 time;
43 u64 info;
44};
45
46struct ism_client {
47 const char *name;
48 void (*handle_event)(struct ism_dev *dev, struct ism_event *event);
49 /* Private area - don't touch! */
50 u8 id;
51};
52
53int ism_register_client(struct ism_client *client);
54int ism_unregister_client(struct ism_client *client);
55static inline void *ism_get_priv(struct ism_dev *dev,
56 struct ism_client *client) {
57 return dev->priv[client->id];
58}
59
60static inline void ism_set_priv(struct ism_dev *dev, struct ism_client *client,
61 void *priv) {
62 dev->priv[client->id] = priv;
63}
64
65const struct smcd_ops *ism_get_smcd_ops(void);
66
67#endif /* _ISM_H */