diff options
Diffstat (limited to 'drivers/edgetpu/edgetpu-mailbox.h')
| -rw-r--r-- | drivers/edgetpu/edgetpu-mailbox.h | 55 |
1 files changed, 51 insertions, 4 deletions
diff --git a/drivers/edgetpu/edgetpu-mailbox.h b/drivers/edgetpu/edgetpu-mailbox.h index d0fb9ae..1ae4889 100644 --- a/drivers/edgetpu/edgetpu-mailbox.h +++ b/drivers/edgetpu/edgetpu-mailbox.h @@ -31,6 +31,9 @@ /* Size of CSRs start from cmd_queue_csr_base can be mmap-ed to userspace. */ #define USERSPACE_CSR_SIZE 0x1000ul +/* Mailbox ID to indicate external mailboxes */ +#define EDGETPU_MAILBOX_ID_USE_ASSOC -1 + struct edgetpu_device_group; struct edgetpu_mailbox { @@ -78,6 +81,34 @@ struct edgetpu_vii { edgetpu_queue_mem resp_queue_mem; }; +/* Structure to hold info about mailbox and its queues. */ +struct edgetpu_mailbox_descriptor { + struct edgetpu_mailbox *mailbox; + edgetpu_queue_mem cmd_queue_mem; + edgetpu_queue_mem resp_queue_mem; +}; + +/* Structure to hold multiple external mailboxes allocated for a device group. */ +struct edgetpu_external_mailbox { + /* Number of external mailboxes allocated for a device group. */ + int count; + /* Leader of device group. */ + struct edgetpu_dev *etdev; + /* Array of external mailboxes info with length @count. */ + struct edgetpu_mailbox_descriptor *descriptors; + /* Mailbox attribute for allocated external mailboxes. */ + struct edgetpu_mailbox_attr attr; +}; + +/* Structure used for requesting to allocate external mailboxes. */ +struct edgetpu_external_mailbox_req { + uint start; /* starting index of external mailbox in mailbox_manager */ + uint end; /* end index of external mailbox in mailbox_manager */ + /* number of mailboxes to be allocated, should be less or equal to (end - start + 1) */ + uint count; + struct edgetpu_mailbox_attr attr; /* mailbox attribute for allocation */ +}; + /* * Structure for recording the driver state vs FW state. * @@ -107,6 +138,8 @@ struct edgetpu_mailbox_manager { u8 vii_index_from, vii_index_to; /* indices reserved for P2P, the range is [from, to) */ u8 p2p_index_from, p2p_index_to; + /* indices reserved for external mailboxes */ + u8 ext_index_from, ext_index_to; rwlock_t mailboxes_lock; /* protects mailboxes */ struct edgetpu_mailbox **mailboxes; /* converts index (0 ~ num_mailbox - 1) of mailbox to CSR offset */ @@ -121,6 +154,7 @@ struct edgetpu_mailbox_manager_desc { u8 num_mailbox; u8 num_vii_mailbox; u8 num_p2p_mailbox; + u8 num_ext_mailbox; get_csr_base_t get_context_csr_base; get_csr_base_t get_cmd_queue_csr_base; get_csr_base_t get_resp_queue_csr_base; @@ -302,11 +336,18 @@ void edgetpu_mailbox_restore_active_vii_queues(struct edgetpu_dev *etdev); int edgetpu_mailbox_p2p_batch(struct edgetpu_mailbox_manager *mgr, uint n, uint skip_i, struct edgetpu_mailbox **mailboxes); -/* Notify firmware of an external mailbox becoming active */ -int edgetpu_mailbox_enable_ext(struct edgetpu_client *client, u32 mailbox_id); +/* + * If @mailbox_id is EDGETPU_MAILBOX_ID_USE_ASSOC, use @ext_mailbox_req to + * allocate external mailboxes and activate the allocated mailboxes. + * Otherwise, activate the external mailbox with id @mailbox_id. + */ +int edgetpu_mailbox_enable_ext(struct edgetpu_client *client, int mailbox_id, + struct edgetpu_external_mailbox_req *ext_mailbox_req); -/* Notify firmware of an external mailbox becoming inactive */ -int edgetpu_mailbox_disable_ext(struct edgetpu_client *client, u32 mailbox_id); +/* + * Notify firmware of an external mailboxes becoming inactive. + */ +int edgetpu_mailbox_disable_ext(struct edgetpu_client *client, int mailbox_id); /* * Activates @mailbox_id, OPEN_DEVICE KCI will be sent. @@ -324,6 +365,12 @@ int edgetpu_mailbox_activate(struct edgetpu_dev *etdev, u32 mailbox_id, s16 vcid int edgetpu_mailbox_deactivate(struct edgetpu_dev *etdev, u32 mailbox_id); /* Sets @eh->fw_state to 0. */ void edgetpu_handshake_clear_fw_state(struct edgetpu_handshake *eh); +/* + * Disables and frees any external mailboxes allocated for @group. + * + * Caller must hold @group->lock. + */ +void edgetpu_mailbox_external_disable_free_locked(struct edgetpu_device_group *group); /* Utilities of circular queue operations */ |