drivers/char/tpm/tpm_vtpm.h

   1 #ifndef TPM_VTPM_H
   2 #define TPM_VTPM_H
   3
   4 struct tpm_chip;
   5 struct tpm_private;
   6
   7 struct vtpm_state {
   8         struct transmission *current_request;
   9         spinlock_t           req_list_lock;
  10         wait_queue_head_t    req_wait_queue;
  11
  12         struct list_head     queued_requests;
  13
  14         struct transmission *current_response;
  15         spinlock_t           resp_list_lock;
  16         wait_queue_head_t    resp_wait_queue;     // processes waiting for responses
  17
  18         u8                   vd_status;
  19         u8                   flags;
  20
  21         unsigned long        disconnect_time;
  22
  23         /*
  24          * The following is a private structure of the underlying
  25          * driver. It is passed as parameter in the send function.
  26          */
  27         struct tpm_private *tpm_private;
  28 };
  29
  30
  31 enum vdev_status {
  32         TPM_VD_STATUS_DISCONNECTED = 0x0,
  33         TPM_VD_STATUS_CONNECTED = 0x1
  34 };
  35
  36 /* this function is called from tpm_vtpm.c */
  37 int vtpm_vd_send(struct tpm_private * tp,
  38                  const u8 * buf, size_t count, void *ptr);
  39
  40 /* these functions are offered by tpm_vtpm.c */
  41 struct tpm_chip *init_vtpm(struct device *,
  42                            struct tpm_private *);
  43 void cleanup_vtpm(struct device *);
  44 int vtpm_vd_recv(const struct tpm_chip* chip,
  45                  const unsigned char *buffer, size_t count, void *ptr);
  46 void vtpm_vd_status(const struct tpm_chip *, u8 status);
  47
  48 static inline struct tpm_private *tpm_private_from_dev(struct device *dev)
  49 {
  50         struct tpm_chip *chip = dev_get_drvdata(dev);
  51         struct vtpm_state *vtpms = chip_get_private(chip);
  52         return vtpms->tpm_private;
  53 }
  54
  55 #endif