struct nvshm_iobuf *nvshm_queue_get(struct nvshm_handle *handle)
{
struct nvshm_iobuf *dummy, *ret;
if (!handle->shared_queue_head) {
pr_err("%s: Queue not init!\n", __func__);
return NULL;
}
dummy = handle->shared_queue_head;
/* Invalidate lower part of iobuf - upper part can be written by AP */
INV_CPU_DCACHE(&dummy->qnext,
sizeof(struct nvshm_iobuf) / 2);
ret = NVSHM_B2A(handle, dummy->qnext);
if (dummy->qnext == NULL)
return NULL;
/* Invalidate iobuf(s) and check validity */
handle->errno = inv_iob_list(handle, ret);
if (handle->errno) {
pr_err("%s: queue corruption\n", __func__);
return NULL;
}
handle->shared_queue_head = ret;
/* Update queue_bb_offset for debug purpose */
handle->conf->queue_bb_offset = (int)ret
- (int)handle->ipc_base_virt;
if ((handle->conf->queue_bb_offset < 0) ||
(handle->conf->queue_bb_offset > handle->conf->shmem_size))
pr_err("%s: out of bound descriptor offset %d addr 0x%p/0x%p\n",
__func__,
handle->conf->queue_bb_offset,
ret,
NVSHM_A2B(handle, ret));
pr_debug("%s (%p)->%p->(%p)\n", __func__,
dummy, ret, ret->qnext);
dummy->qnext = NULL;
nvshm_iobuf_free(dummy);
return ret;
}
void nvshm_iobuf_free_cluster(struct nvshm_iobuf *list)
{
struct nvshm_handle *priv = nvshm_get_handle();
struct nvshm_iobuf *_phy_list, *_to_free, *leaf;
int n = 0;
_phy_list = list;
while (_phy_list) {
_to_free = list;
if (list->sg_next) {
_phy_list = list->sg_next;
if (_phy_list) {
leaf = NVSHM_B2A(priv, _phy_list);
leaf->next = list->next;
}
} else {
_phy_list = list->next;
}
list = NVSHM_B2A(priv, _phy_list);
n++;
nvshm_iobuf_free(_to_free);
}
}
