1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Internal Shared Memory
5 * Definitions for the ISM module
7 * Copyright IBM Corp. 2022
12 #include <linux/workqueue.h>
25 /* Unless we gain unexpected popularity, this limit should hold for a while */
27 #define ISM_NR_DMBS 1920
30 spinlock_t lock; /* protects the ism device */
31 struct list_head list;
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];
41 dma_addr_t ieq_dma_addr;
47 struct ism_client *subs[MAX_CLIENTS];
60 void (*add)(struct ism_dev *dev);
61 void (*remove)(struct ism_dev *dev);
62 void (*handle_event)(struct ism_dev *dev, struct ism_event *event);
63 /* Parameter dmbemask contains a bit vector with updated DMBEs, if sent
64 * via ism_move_data(). Callback function must handle all active bits
65 * indicated by dmbemask.
67 void (*handle_irq)(struct ism_dev *dev, unsigned int bit, u16 dmbemask);
68 /* Private area - don't touch! */
72 int ism_register_client(struct ism_client *client);
73 int ism_unregister_client(struct ism_client *client);
74 static inline void *ism_get_priv(struct ism_dev *dev,
75 struct ism_client *client) {
76 return dev->priv[client->id];
79 static inline void ism_set_priv(struct ism_dev *dev, struct ism_client *client,
81 dev->priv[client->id] = priv;
84 int ism_register_dmb(struct ism_dev *dev, struct ism_dmb *dmb,
85 struct ism_client *client);
86 int ism_unregister_dmb(struct ism_dev *dev, struct ism_dmb *dmb);
87 int ism_move(struct ism_dev *dev, u64 dmb_tok, unsigned int idx, bool sf,
88 unsigned int offset, void *data, unsigned int size);
89 u8 *ism_get_seid(void);
91 const struct smcd_ops *ism_get_smcd_ops(void);