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 18 struct 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 38 struct ism_event { 39 u32 type; 40 u32 code; 41 u64 tok; 42 u64 time; 43 u64 info; 44 }; 45 46 struct 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 53 int ism_register_client(struct ism_client *client); 54 int ism_unregister_client(struct ism_client *client); 55 static inline void *ism_get_priv(struct ism_dev *dev, 56 struct ism_client *client) { 57 return dev->priv[client->id]; 58 } 59 60 static inline void ism_set_priv(struct ism_dev *dev, struct ism_client *client, 61 void *priv) { 62 dev->priv[client->id] = priv; 63 } 64 65 const struct smcd_ops *ism_get_smcd_ops(void); 66 67 #endif /* _ISM_H */ 68