void read_init_vars(struct mlx5_context *ctx)
{
pthread_mutex_lock(&ctx->env_mtx);
if (!ctx->env_initialized) {
mlx5_single_threaded = single_threaded_app(&ctx->ibv_ctx);
mlx5_use_mutex = get_use_mutex(&ctx->ibv_ctx);
open_debug_file(ctx);
set_debug_mask(&ctx->ibv_ctx);
set_freeze_on_error(&ctx->ibv_ctx);
ctx->prefer_bf = get_always_bf(&ctx->ibv_ctx);
ctx->shut_up_bf = get_shut_up_bf(&ctx->ibv_ctx);
mlx5_read_env(ctx);
ctx->env_initialized = 1;
}
pthread_mutex_unlock(&ctx->env_mtx);
}
static int mlx5_alloc_context(struct verbs_device *vdev,
struct ibv_context *ctx, int cmd_fd)
{
struct mlx5_context *context;
struct mlx5_alloc_ucontext req;
struct mlx5_alloc_ucontext_resp resp;
struct ibv_device *ibdev = &vdev->device;
struct verbs_context *verbs_ctx = verbs_get_ctx(ctx);
int i;
int page_size = to_mdev(ibdev)->page_size;
int tot_uuars;
int low_lat_uuars;
int gross_uuars;
int j;
off_t offset;
mlx5_single_threaded = single_threaded_app();
context = to_mctx(ctx);
context->ibv_ctx.cmd_fd = cmd_fd;
memset(&resp, 0, sizeof(resp));
open_debug_file(context);
set_debug_mask();
set_freeze_on_error();
if (gethostname(context->hostname, sizeof(context->hostname)))
strcpy(context->hostname, "host_unknown");
tot_uuars = get_total_uuars();
if (tot_uuars <= 0) {
if (tot_uuars == 0)
errno = EINVAL;
else
errno = -tot_uuars;
goto err_free;
}
gross_uuars = tot_uuars / MLX5_NUM_UUARS_PER_PAGE * 4;
context->bfs = calloc(gross_uuars, sizeof *context->bfs);
if (!context->bfs) {
errno = ENOMEM;
goto err_free;
}
low_lat_uuars = get_num_low_lat_uuars();
if (low_lat_uuars < 0) {
errno = ENOMEM;
goto err_free_bf;
}
if (low_lat_uuars > tot_uuars - 1) {
errno = ENOMEM;
goto err_free_bf;
}
memset(&req, 0, sizeof(req));
req.total_num_uuars = tot_uuars;
req.num_low_latency_uuars = low_lat_uuars;
if (ibv_cmd_get_context(&context->ibv_ctx, &req.ibv_req, sizeof req,
&resp.ibv_resp, sizeof resp))
goto err_free_bf;
context->max_num_qps = resp.qp_tab_size;
context->bf_reg_size = resp.bf_reg_size;
context->tot_uuars = resp.tot_uuars;
context->low_lat_uuars = low_lat_uuars;
context->cache_line_size = resp.cache_line_size;
context->max_sq_desc_sz = resp.max_sq_desc_sz;
context->max_rq_desc_sz = resp.max_rq_desc_sz;
context->max_send_wqebb = resp.max_send_wqebb;
context->num_ports = resp.num_ports;
context->max_recv_wr = resp.max_recv_wr;
context->max_srq_recv_wr = resp.max_srq_recv_wr;
context->max_desc_sz_sq_dc = resp.max_desc_sz_sq_dc;
context->atomic_sizes_dc = resp.atomic_sizes_dc;
pthread_mutex_init(&context->rsc_table_mutex, NULL);
pthread_mutex_init(&context->srq_table_mutex, NULL);
for (i = 0; i < MLX5_QP_TABLE_SIZE; ++i)
context->rsc_table[i].refcnt = 0;
context->db_list = NULL;
pthread_mutex_init(&context->db_list_mutex, NULL);
for (i = 0; i < resp.tot_uuars / MLX5_NUM_UUARS_PER_PAGE; ++i) {
offset = 0;
set_command(MLX5_MMAP_GET_REGULAR_PAGES_CMD, &offset);
set_index(i, &offset);
context->uar[i] = mmap(NULL, to_mdev(ibdev)->page_size, PROT_WRITE,
MAP_SHARED, cmd_fd,
page_size * offset);
if (context->uar[i] == MAP_FAILED) {
context->uar[i] = NULL;
goto err_free_bf;
}
}
for (j = 0; j < gross_uuars; ++j) {
context->bfs[j].reg = context->uar[j / 4] +
MLX5_BF_OFFSET + (j % 4) * context->bf_reg_size;
context->bfs[j].need_lock = need_uuar_lock(context, j);
mlx5_spinlock_init(&context->bfs[j].lock);
context->bfs[j].offset = 0;
if (j)
context->bfs[j].buf_size = context->bf_reg_size / 2;
context->bfs[j].uuarn = j;
}
mlx5_spinlock_init(&context->lock32);
context->prefer_bf = get_always_bf();
context->shut_up_bf = get_shut_up_bf();
mlx5_read_env(ibdev, context);
mlx5_spinlock_init(&context->hugetlb_lock);
INIT_LIST_HEAD(&context->hugetlb_list);
pthread_mutex_init(&context->task_mutex, NULL);
ctx->ops = mlx5_ctx_ops;
set_extended(verbs_ctx);
set_experimental(ctx);
return 0;
err_free_bf:
free(context->bfs);
err_free:
for (i = 0; i < MLX5_MAX_UAR_PAGES; ++i) {
if (context->uar[i])
munmap(context->uar[i], page_size);
}
close_debug_file(context);
return errno;
}
