soc/tegra/ivc.h

1 /* SPDX-License-Identifier: GPL-2.0-only */
10 #include <linux/dma-mapping.h>
11 #include <linux/iosys-map.h>
20 		struct iosys_map map;  member
33  * tegra_ivc_read_get_next_frame - Peek at the next frame to receive
34  * @ivc		pointer of the IVC channel
36  * Peek at the next frame to be received, without removing it from
39  * Returns a pointer to the frame, or an error encoded pointer.
41 int tegra_ivc_read_get_next_frame(struct tegra_ivc *ivc, struct iosys_map *map);
44  * tegra_ivc_read_advance - Advance the read queue
45  * @ivc		pointer of the IVC channel
54  * tegra_ivc_write_get_next_frame - Poke at the next frame to transmit
55  * @ivc		pointer of the IVC channel
57  * Get access to the next frame.
59  * Returns a pointer to the frame, or an error encoded pointer.
61 int tegra_ivc_write_get_next_frame(struct tegra_ivc *ivc, struct iosys_map *map);
64  * tegra_ivc_write_advance - Advance the write queue
65  * @ivc		pointer of the IVC channel
74  * tegra_ivc_notified - handle internal messages
75  * @ivc		pointer of the IVC channel
79  * Returns 0 if the channel is ready for communication, or -EAGAIN if a channel
85  * tegra_ivc_reset - initiates a reset of the shared memory state
86  * @ivc		pointer of the IVC channel
88  * This function must be called after a channel is reserved before it is used
89  * for communication. The channel will be ready for use when a subsequent call
90  * to notify the remote of the channel reset.