diff options
Diffstat (limited to 'include/linux/mailbox_controller.h')
| -rw-r--r-- | include/linux/mailbox_controller.h | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/include/linux/mailbox_controller.h b/include/linux/mailbox_controller.h index 80a427c7ca29..dc93287a2a01 100644 --- a/include/linux/mailbox_controller.h +++ b/include/linux/mailbox_controller.h @@ -3,6 +3,7 @@ #ifndef __MAILBOX_CONTROLLER_H #define __MAILBOX_CONTROLLER_H +#include <linux/bits.h> #include <linux/completion.h> #include <linux/device.h> #include <linux/hrtimer.h> @@ -11,6 +12,13 @@ struct mbox_chan; +/* Sentinel value distinguishing "no active request" from "NULL message data" */ +#define MBOX_NO_MSG ((void *)-1) + +#define MBOX_TXDONE_BY_IRQ BIT(0) /* controller has remote RTR irq */ +#define MBOX_TXDONE_BY_POLL BIT(1) /* controller can read status of last TX */ +#define MBOX_TXDONE_BY_ACK BIT(2) /* S/W ACK received by Client ticks the TX */ + /** * struct mbox_chan_ops - methods to control mailbox channels * @send_data: The API asks the MBOX controller driver, in atomic @@ -54,10 +62,10 @@ struct mbox_chan_ops { /** * struct mbox_controller - Controller of a class of communication channels - * @dev: Device backing this controller - * @ops: Operators that work on each communication chan - * @chans: Array of channels - * @num_chans: Number of channels in the 'chans' array. + * @dev: Device backing this controller. Required. + * @ops: Operators that work on each communication chan. Required. + * @chans: Array of channels. Required. + * @num_chans: Number of channels in the 'chans' array. Required. * @txdone_irq: Indicates if the controller can report to API when * the last transmitted data was read by the remote. * Eg, if it has some TX ACK irq. @@ -70,6 +78,7 @@ struct mbox_chan_ops { * @of_xlate: Controller driver specific mapping of channel via DT * @poll_hrt: API private. hrtimer used to poll for TXDONE on all * channels. + * @poll_hrt_lock: API private. Lock protecting access to poll_hrt. * @node: API private. To hook into list of controllers. */ struct mbox_controller { |