e13213cafb
No functional changes. Only a bit of code cleanup and refactoring. Signed-off-by: Carlo Caione <ccaione@baylibre.com>
68 lines
2.6 KiB
C
68 lines
2.6 KiB
C
/*
|
|
* Copyright (c) 2021 Nordic Semiconductor ASA
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#define SHM_DEVICE_NAME "sram0.shm"
|
|
|
|
#define RPMSG_VQ_0 (0) /* TX virtqueue queue index */
|
|
#define RPMSG_VQ_1 (1) /* RX virtqueue queue index */
|
|
#define VRING_COUNT (2) /* Number of used vring buffers. */
|
|
|
|
#define IPC_INSTANCE_COUNT (CONFIG_RPMSG_MULTI_INSTANCES_NO) /* Number of IPC instances.*/
|
|
|
|
/* Private macros. */
|
|
#define VRING_DESC_SIZEOF(num) ((num) * (sizeof(struct vring_desc)))
|
|
#define VRING_AVAIL_SIZEOF(num) (sizeof(struct vring_avail) + \
|
|
((num) * sizeof(uint16_t)) + sizeof(uint16_t))
|
|
#define VRING_USED_SIZEOF(num) (sizeof(struct vring_used) + \
|
|
((num) * sizeof(struct vring_used_elem)) + \
|
|
sizeof(uint16_t))
|
|
|
|
#define VRING_FIRST_SUM(num) (VRING_DESC_SIZEOF(num) + VRING_AVAIL_SIZEOF(num))
|
|
|
|
|
|
/* Compute size of vring buffer based on its size and alignment. */
|
|
#define VRING_SIZE_COMPUTE(vring_size, align) (ROUND_UP(VRING_FIRST_SUM((vring_size)), \
|
|
(align)) + VRING_USED_SIZEOF((vring_size)))
|
|
|
|
/* Macro for calculating used memory by virtqueue buffers for remote device. */
|
|
#define VIRTQUEUE_SIZE_GET(vring_size) (RPMSG_BUFFER_SIZE * (vring_size))
|
|
|
|
/* Macro for getting the size of shared memory occupied by single IPC instance. */
|
|
#define SHMEM_INST_SIZE_GET(vring_size) (VDEV_STATUS_SIZE + \
|
|
(VRING_COUNT * VIRTQUEUE_SIZE_GET((vring_size))) + \
|
|
(VRING_COUNT * VRING_SIZE_COMPUTE((vring_size), \
|
|
(VRING_ALIGNMENT))))
|
|
|
|
/* Returns size of used shared memory consumed by all IPC instances*/
|
|
#define SHMEM_CONSUMED_SIZE_GET(vring_size) (IPC_INSTANCE_COUNT * \
|
|
SHMEM_INST_SIZE_GET((vring_size)))
|
|
|
|
/* Returns maximum allowable size of vring buffers to fit memory requirements. */
|
|
#define VRING_SIZE_GET(shmem_size) ((SHMEM_CONSUMED_SIZE_GET(32)) < (shmem_size) ? 32 : \
|
|
(SHMEM_CONSUMED_SIZE_GET(16)) < (shmem_size) ? 16 : \
|
|
(SHMEM_CONSUMED_SIZE_GET(8)) < (shmem_size) ? 8 : \
|
|
(SHMEM_CONSUMED_SIZE_GET(4)) < (shmem_size) ? 4 : \
|
|
(SHMEM_CONSUMED_SIZE_GET(2)) < (shmem_size) ? 2 : 1)
|
|
|
|
/* Returns size of used shared memory of single instance in case of using
|
|
* maximum allowable vring buffer size.
|
|
*/
|
|
#define SHMEM_INST_SIZE_AUTOALLOC_GET(shmem_size) \
|
|
(SHMEM_INST_SIZE_GET(VRING_SIZE_GET((shmem_size))))
|
|
|
|
/* Returns start address of ipc instance in shared memory. It assumes that
|
|
* maximum allowable vring buffer size is used.
|
|
*/
|
|
#define SHMEM_INST_ADDR_AUTOALLOC_GET(shmem_addr, shmem_size, id) \
|
|
((shmem_addr) + \
|
|
((id) * (SHMEM_INST_SIZE_AUTOALLOC_GET(shmem_size))))
|
|
|
|
#ifdef CONFIG_RPMSG_MULTI_INSTANCE_MASTER
|
|
#define VIRTQUEUE_ID (0)
|
|
#else
|
|
#define VIRTQUEUE_ID (1)
|
|
#endif
|