void sema_sysinit(void *arg)
{
struct semaphore *s = arg;
printf("sema_sysinit\n");
_sema_init(s, 1);
}
int __init
vchiq_platform_init(VCHIQ_STATE_T *state)
{
VCHIQ_SLOT_ZERO_T *vchiq_slot_zero;
int frag_mem_size;
int err;
int i;
/* Allocate space for the channels in coherent memory */
g_slot_mem_size = PAGE_ALIGN(TOTAL_SLOTS * VCHIQ_SLOT_SIZE);
frag_mem_size = PAGE_ALIGN(sizeof(FRAGMENTS_T) * MAX_FRAGMENTS);
err = bus_dma_tag_create(
NULL,
PAGE_SIZE, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
g_slot_mem_size + frag_mem_size, 1, /* maxsize, nsegments */
g_slot_mem_size + frag_mem_size, 0, /* maxsegsize, flags */
NULL, NULL, /* lockfunc, lockarg */
&dma_tag);
err = bus_dmamem_alloc(dma_tag, (void **)&g_slot_mem,
BUS_DMA_COHERENT | BUS_DMA_WAITOK, &dma_map);
if (err) {
vchiq_log_error(vchiq_core_log_level, "Unable to allocate channel memory");
err = -ENOMEM;
goto failed_alloc;
}
err = bus_dmamap_load(dma_tag, dma_map, g_slot_mem,
g_slot_mem_size + frag_mem_size, vchiq_dmamap_cb,
&g_slot_phys, 0);
if (err) {
vchiq_log_error(vchiq_core_log_level, "cannot load DMA map");
err = -ENOMEM;
goto failed_load;
}
WARN_ON(((int)g_slot_mem & (PAGE_SIZE - 1)) != 0);
vchiq_slot_zero = vchiq_init_slots(g_slot_mem, g_slot_mem_size);
if (!vchiq_slot_zero) {
err = -EINVAL;
goto failed_init_slots;
}
vchiq_slot_zero->platform_data[VCHIQ_PLATFORM_FRAGMENTS_OFFSET_IDX] =
(int)g_slot_phys + g_slot_mem_size;
vchiq_slot_zero->platform_data[VCHIQ_PLATFORM_FRAGMENTS_COUNT_IDX] =
MAX_FRAGMENTS;
g_fragments_base = (FRAGMENTS_T *)(g_slot_mem + g_slot_mem_size);
g_slot_mem_size += frag_mem_size;
g_free_fragments = g_fragments_base;
for (i = 0; i < (MAX_FRAGMENTS - 1); i++) {
*(FRAGMENTS_T **)&g_fragments_base[i] =
&g_fragments_base[i + 1];
}
*(FRAGMENTS_T **)&g_fragments_base[i] = NULL;
_sema_init(&g_free_fragments_sema, MAX_FRAGMENTS);
if (vchiq_init_state(state, vchiq_slot_zero, 0/*slave*/) !=
VCHIQ_SUCCESS) {
err = -EINVAL;
goto failed_vchiq_init;
}
bcm_mbox_write(BCM2835_MBOX_CHAN_VCHIQ, (unsigned int)g_slot_phys);
vchiq_log_info(vchiq_arm_log_level,
"vchiq_init - done (slots %x, phys %x)",
(unsigned int)vchiq_slot_zero, g_slot_phys);
vchiq_call_connected_callbacks();
return 0;
failed_vchiq_init:
failed_init_slots:
failed_load:
bus_dmamap_unload(dma_tag, dma_map);
failed_alloc:
bus_dmamap_destroy(dma_tag, dma_map);
bus_dma_tag_destroy(dma_tag);
return err;
}
void sema_sysinit(void *arg)
{
struct semaphore *s = arg;
_sema_init(s, 1);
}
