static struct mlx5_db_page *__add_page(struct mlx5_context *context)
{
struct mlx5_db_page *page;
int ps = to_mdev(context->ibv_ctx.device)->page_size;
int pp;
int i;
int nlong;
pp = ps / context->cache_line_size;
nlong = (pp + 8 * sizeof(long) - 1) / (8 * sizeof(long));
page = malloc(sizeof *page + nlong * sizeof(long));
if (!page)
return NULL;
if (mlx5_alloc_buf(&page->buf, ps, ps)) {
free(page);
return NULL;
}
page->num_db = pp;
page->use_cnt = 0;
for (i = 0; i < nlong; ++i)
page->free[i] = ~0;
page->prev = NULL;
page->next = context->db_list;
context->db_list = page;
if (page->next)
page->next->prev = page;
return page;
}
int mlx5_alloc_srq_buf(struct ibv_context *context, struct mlx5_srq *srq)
{
struct mlx5_wqe_srq_next_seg *next;
int size;
int buf_size;
int i;
struct mlx5_context *ctx;
ctx = to_mctx(context);
if (srq->max_gs < 0) {
errno = EINVAL;
return -1;
}
srq->wrid = malloc(srq->max * sizeof *srq->wrid);
if (!srq->wrid)
return -1;
size = sizeof(struct mlx5_wqe_srq_next_seg) +
srq->max_gs * sizeof(struct mlx5_wqe_data_seg);
size = max(32, size);
size = mlx5_round_up_power_of_two(size);
if (size > ctx->max_recv_wr) {
errno = EINVAL;
return -1;
}
srq->max_gs = (size - sizeof(struct mlx5_wqe_srq_next_seg)) /
sizeof(struct mlx5_wqe_data_seg);
srq->wqe_shift = mlx5_ilog2(size);
buf_size = srq->max * size;
if (mlx5_alloc_buf(&srq->buf, buf_size,
to_mdev(context->device)->page_size)) {
free(srq->wrid);
return -1;
}
memset(srq->buf.buf, 0, buf_size);
/*
* Now initialize the SRQ buffer so that all of the WQEs are
* linked into the list of free WQEs.
*/
for (i = 0; i < srq->max; ++i) {
next = get_wqe(srq, i);
next->next_wqe_index = htobe16((i + 1) & (srq->max - 1));
}
srq->head = 0;
srq->tail = srq->max - 1;
return 0;
}