drivers/staging/greybus/hd.h

   1 /*
   2  * Greybus Host Device
   3  *
   4  * Copyright 2014-2015 Google Inc.
   5  * Copyright 2014-2015 Linaro Ltd.
   6  *
   7  * Released under the GPLv2 only.
   8  */
   9
  10 #ifndef __HD_H
  11 #define __HD_H
  12
  13 struct gb_host_device;
  14 struct gb_message;
  15
  16 struct gb_hd_driver {
  17         size_t  hd_priv_size;
  18
  19         int (*cport_allocate)(struct gb_host_device *hd, int cport_id,
  20                                 unsigned long flags);
  21         void (*cport_release)(struct gb_host_device *hd, u16 cport_id);
  22         int (*cport_enable)(struct gb_host_device *hd, u16 cport_id,
  23                                 unsigned long flags);
  24         int (*cport_disable)(struct gb_host_device *hd, u16 cport_id);
  25         int (*cport_connected)(struct gb_host_device *hd, u16 cport_id);
  26         int (*cport_flush)(struct gb_host_device *hd, u16 cport_id);
  27         int (*cport_shutdown)(struct gb_host_device *hd, u16 cport_id,
  28                                 u8 phase, unsigned int timeout);
  29         int (*cport_quiesce)(struct gb_host_device *hd, u16 cport_id,
  30                                 size_t peer_space, unsigned int timeout);
  31         int (*cport_clear)(struct gb_host_device *hd, u16 cport_id);
  32
  33         int (*message_send)(struct gb_host_device *hd, u16 dest_cport_id,
  34                         struct gb_message *message, gfp_t gfp_mask);
  35         void (*message_cancel)(struct gb_message *message);
  36         int (*latency_tag_enable)(struct gb_host_device *hd, u16 cport_id);
  37         int (*latency_tag_disable)(struct gb_host_device *hd, u16 cport_id);
  38         int (*output)(struct gb_host_device *hd, void *req, u16 size, u8 cmd,
  39                       bool async);
  40 };
  41
  42 struct gb_host_device {
  43         struct device dev;
  44         int bus_id;
  45         const struct gb_hd_driver *driver;
  46
  47         struct list_head modules;
  48         struct list_head connections;
  49         struct ida cport_id_map;
  50
  51         /* Number of CPorts supported by the UniPro IP */
  52         size_t num_cports;
  53
  54         /* Host device buffer constraints */
  55         size_t buffer_size_max;
  56
  57         struct gb_svc *svc;
  58         /* Private data for the host driver */
  59         unsigned long hd_priv[0] __aligned(sizeof(s64));
  60 };
  61 #define to_gb_host_device(d) container_of(d, struct gb_host_device, dev)
  62
  63 int gb_hd_cport_reserve(struct gb_host_device *hd, u16 cport_id);
  64 void gb_hd_cport_release_reserved(struct gb_host_device *hd, u16 cport_id);
  65 int gb_hd_cport_allocate(struct gb_host_device *hd, int cport_id,
  66                                         unsigned long flags);
  67 void gb_hd_cport_release(struct gb_host_device *hd, u16 cport_id);
  68
  69 struct gb_host_device *gb_hd_create(struct gb_hd_driver *driver,
  70                                         struct device *parent,
  71                                         size_t buffer_size_max,
  72                                         size_t num_cports);
  73 int gb_hd_add(struct gb_host_device *hd);
  74 void gb_hd_del(struct gb_host_device *hd);
  75 void gb_hd_shutdown(struct gb_host_device *hd);
  76 void gb_hd_put(struct gb_host_device *hd);
  77 int gb_hd_output(struct gb_host_device *hd, void *req, u16 size, u8 cmd,
  78                  bool in_irq);
  79
  80 int gb_hd_init(void);
  81 void gb_hd_exit(void);
  82
  83 #endif  /* __HD_H */