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1baedb13 SR |
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 | ||
89e7d2ba SR |
12 | #include <linux/workqueue.h> |
13 | ||
1baedb13 SR |
14 | struct ism_dmb { |
15 | u64 dmb_tok; | |
16 | u64 rgid; | |
17 | u32 dmb_len; | |
18 | u32 sba_idx; | |
19 | u32 vlan_valid; | |
20 | u32 vlan_id; | |
21 | void *cpu_addr; | |
22 | dma_addr_t dma_addr; | |
23 | }; | |
24 | ||
89e7d2ba SR |
25 | /* Unless we gain unexpected popularity, this limit should hold for a while */ |
26 | #define MAX_CLIENTS 8 | |
27 | #define ISM_NR_DMBS 1920 | |
28 | ||
29 | struct ism_dev { | |
30 | spinlock_t lock; /* protects the ism device */ | |
31 | struct list_head list; | |
32 | struct pci_dev *pdev; | |
89e7d2ba SR |
33 | |
34 | struct ism_sba *sba; | |
35 | dma_addr_t sba_dma_addr; | |
36 | DECLARE_BITMAP(sba_bitmap, ISM_NR_DMBS); | |
37 | u8 *sba_client_arr; /* entries are indices into 'clients' array */ | |
38 | void *priv[MAX_CLIENTS]; | |
39 | ||
40 | struct ism_eq *ieq; | |
41 | dma_addr_t ieq_dma_addr; | |
42 | ||
43 | struct device dev; | |
44 | u64 local_gid; | |
45 | int ieq_idx; | |
46 | ||
47 | atomic_t free_clients_cnt; | |
48 | atomic_t add_dev_cnt; | |
49 | wait_queue_head_t waitq; | |
50 | }; | |
51 | ||
52 | struct ism_event { | |
53 | u32 type; | |
54 | u32 code; | |
55 | u64 tok; | |
56 | u64 time; | |
57 | u64 info; | |
58 | }; | |
59 | ||
60 | struct ism_client { | |
61 | const char *name; | |
62 | void (*add)(struct ism_dev *dev); | |
63 | void (*remove)(struct ism_dev *dev); | |
64 | void (*handle_event)(struct ism_dev *dev, struct ism_event *event); | |
65 | /* Parameter dmbemask contains a bit vector with updated DMBEs, if sent | |
66 | * via ism_move_data(). Callback function must handle all active bits | |
67 | * indicated by dmbemask. | |
68 | */ | |
69 | void (*handle_irq)(struct ism_dev *dev, unsigned int bit, u16 dmbemask); | |
70 | /* Private area - don't touch! */ | |
71 | struct work_struct remove_work; | |
72 | struct work_struct add_work; | |
73 | struct ism_dev *tgt_ism; | |
74 | u8 id; | |
75 | }; | |
76 | ||
77 | int ism_register_client(struct ism_client *client); | |
78 | int ism_unregister_client(struct ism_client *client); | |
79 | static inline void *ism_get_priv(struct ism_dev *dev, | |
80 | struct ism_client *client) { | |
81 | return dev->priv[client->id]; | |
82 | } | |
83 | ||
84 | static inline void ism_set_priv(struct ism_dev *dev, struct ism_client *client, | |
85 | void *priv) { | |
86 | dev->priv[client->id] = priv; | |
87 | } | |
88 | ||
9de4df7b SR |
89 | int ism_register_dmb(struct ism_dev *dev, struct ism_dmb *dmb, |
90 | struct ism_client *client); | |
91 | int ism_unregister_dmb(struct ism_dev *dev, struct ism_dmb *dmb); | |
92 | int ism_move(struct ism_dev *dev, u64 dmb_tok, unsigned int idx, bool sf, | |
93 | unsigned int offset, void *data, unsigned int size); | |
94 | u8 *ism_get_seid(void); | |
95 | ||
820f2100 SR |
96 | const struct smcd_ops *ism_get_smcd_ops(void); |
97 | ||
1baedb13 | 98 | #endif /* _ISM_H */ |