1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Greybus Host Device 4 * 5 * Copyright 2014-2015 Google Inc. 6 * Copyright 2014-2015 Linaro Ltd. 7 */ 8 9 #ifndef __HD_H 10 #define __HD_H 11 12 #include <linux/types.h> 13 #include <linux/device.h> 14 15 struct gb_host_device; 16 struct gb_message; 17 18 struct gb_hd_driver { 19 size_t hd_priv_size; 20 21 int (*cport_allocate)(struct gb_host_device *hd, int cport_id, 22 unsigned long flags); 23 void (*cport_release)(struct gb_host_device *hd, u16 cport_id); 24 int (*cport_enable)(struct gb_host_device *hd, u16 cport_id, 25 unsigned long flags); 26 int (*cport_disable)(struct gb_host_device *hd, u16 cport_id); 27 int (*cport_connected)(struct gb_host_device *hd, u16 cport_id); 28 int (*cport_flush)(struct gb_host_device *hd, u16 cport_id); 29 int (*cport_shutdown)(struct gb_host_device *hd, u16 cport_id, 30 u8 phase, unsigned int timeout); 31 int (*cport_quiesce)(struct gb_host_device *hd, u16 cport_id, 32 size_t peer_space, unsigned int timeout); 33 int (*cport_clear)(struct gb_host_device *hd, u16 cport_id); 34 35 int (*message_send)(struct gb_host_device *hd, u16 dest_cport_id, 36 struct gb_message *message, gfp_t gfp_mask); 37 void (*message_cancel)(struct gb_message *message); 38 int (*latency_tag_enable)(struct gb_host_device *hd, u16 cport_id); 39 int (*latency_tag_disable)(struct gb_host_device *hd, u16 cport_id); 40 int (*output)(struct gb_host_device *hd, void *req, u16 size, u8 cmd, 41 bool async); 42 }; 43 44 struct gb_host_device { 45 struct device dev; 46 int bus_id; 47 const struct gb_hd_driver *driver; 48 49 struct list_head modules; 50 struct list_head connections; 51 struct ida cport_id_map; 52 53 /* Number of CPorts supported by the UniPro IP */ 54 size_t num_cports; 55 56 /* Host device buffer constraints */ 57 size_t buffer_size_max; 58 59 struct gb_svc *svc; 60 /* Private data for the host driver */ 61 unsigned long hd_priv[] __aligned(sizeof(s64)); 62 }; 63 #define to_gb_host_device(d) container_of(d, struct gb_host_device, dev) 64 65 int gb_hd_cport_reserve(struct gb_host_device *hd, u16 cport_id); 66 void gb_hd_cport_release_reserved(struct gb_host_device *hd, u16 cport_id); 67 int gb_hd_cport_allocate(struct gb_host_device *hd, int cport_id, 68 unsigned long flags); 69 void gb_hd_cport_release(struct gb_host_device *hd, u16 cport_id); 70 71 struct gb_host_device *gb_hd_create(struct gb_hd_driver *driver, 72 struct device *parent, 73 size_t buffer_size_max, 74 size_t num_cports); 75 int gb_hd_add(struct gb_host_device *hd); 76 void gb_hd_del(struct gb_host_device *hd); 77 void gb_hd_shutdown(struct gb_host_device *hd); 78 void gb_hd_put(struct gb_host_device *hd); 79 int gb_hd_output(struct gb_host_device *hd, void *req, u16 size, u8 cmd, 80 bool in_irq); 81 82 int gb_hd_init(void); 83 void gb_hd_exit(void); 84 85 #endif /* __HD_H */ 86