/* * reserve a port number. if "0" specified, we will try to pick one * starting at roce_next_port. roce_next_port will take on the values * 1..4096 */ u16 usnic_transport_rsrv_port(enum usnic_transport_type type, u16 port_num) { if (type == USNIC_TRANSPORT_ROCE_CUSTOM) { spin_lock(&roce_bitmap_lock); if (!port_num) { port_num = bitmap_find_next_zero_area(roce_bitmap, ROCE_BITMAP_SZ, roce_next_port /* start */, 1 /* nr */, 0 /* align */); roce_next_port = (port_num & 4095) + 1; } else if (test_bit(port_num, roce_bitmap)) { usnic_err("Failed to allocate port for %s\n", usnic_transport_to_str(type)); spin_unlock(&roce_bitmap_lock); goto out_fail; } bitmap_set(roce_bitmap, port_num, 1); spin_unlock(&roce_bitmap_lock); } else { usnic_err("Failed to allocate port - transport %s unsupported\n", usnic_transport_to_str(type)); goto out_fail; } usnic_dbg("Allocating port %hu for %s\n", port_num, usnic_transport_to_str(type)); return port_num; out_fail: return 0; }
void usnic_transport_unrsrv_port(enum usnic_transport_type type, u16 port_num) { if (type == USNIC_TRANSPORT_ROCE_CUSTOM) { spin_lock(&roce_bitmap_lock); if (!port_num) { usnic_err("Unreserved unvalid port num 0 for %s\n", usnic_transport_to_str(type)); goto out_roce_custom; } if (!test_bit(port_num, roce_bitmap)) { usnic_err("Unreserving invalid %hu for %s\n", port_num, usnic_transport_to_str(type)); goto out_roce_custom; } bitmap_clear(roce_bitmap, port_num, 1); usnic_dbg("Freeing port %hu for %s\n", port_num, usnic_transport_to_str(type)); out_roce_custom: spin_unlock(&roce_bitmap_lock); } else { usnic_err("Freeing invalid port %hu for %d\n", port_num, type); } }
static ssize_t flowinfo_read(struct file *f, char __user *data, size_t count, loff_t *ppos) { struct usnic_ib_qp_grp_flow *qp_flow; int n; int left; char *ptr; char buf[512]; qp_flow = f->private_data; ptr = buf; left = count; if (*ppos > 0) return 0; spin_lock(&qp_flow->qp_grp->lock); n = scnprintf(ptr, left, "QP Grp ID: %d Transport: %s ", qp_flow->qp_grp->grp_id, usnic_transport_to_str(qp_flow->trans_type)); UPDATE_PTR_LEFT(n, ptr, left); if (qp_flow->trans_type == USNIC_TRANSPORT_ROCE_CUSTOM) { n = scnprintf(ptr, left, "Port_Num:%hu\n", qp_flow->usnic_roce.port_num); UPDATE_PTR_LEFT(n, ptr, left); } else if (qp_flow->trans_type == USNIC_TRANSPORT_IPV4_UDP) { n = usnic_transport_sock_to_str(ptr, left, qp_flow->udp.sock); UPDATE_PTR_LEFT(n, ptr, left); n = scnprintf(ptr, left, "\n"); UPDATE_PTR_LEFT(n, ptr, left); } spin_unlock(&qp_flow->qp_grp->lock); return simple_read_from_buffer(data, count, ppos, buf, ptr - buf); }