100 	int credits, usb3, pcie, spare;  in tb_available_credits()  local
114 	credits = tb_usable_credits(port);  in tb_available_credits()
121 			ndp = (credits - (usb3 + pcie + spare)) /  in tb_available_credits()
128 	credits -= ndp * (sw->min_dp_aux_credits + sw->min_dp_main_credits);  in tb_available_credits()
129 	credits -= usb3;  in tb_available_credits()
134 	return credits > 0 ? credits : 0;  in tb_available_credits()
238 	unsigned int credits;  in tb_pci_init_credits()  local
244 		credits = min(sw->max_pcie_credits, available);  in tb_pci_init_credits()
246 		if (credits < TB_MIN_PCIE_CREDITS)  in tb_pci_init_credits()
249 		credits = max(TB_MIN_PCIE_CREDITS, credits);  in tb_pci_init_credits()
252 			credits = port->bonded ? 32 : 16;  in tb_pci_init_credits()
254 			credits = 7;  in tb_pci_init_credits()
257 	hop->initial_credits = credits;  in tb_pci_init_credits()
1510 	int credits;  in tb_dma_available_credits()  local
1512 	credits = tb_available_credits(port, NULL);  in tb_dma_available_credits()
1514 		credits -= sw->max_pcie_credits;  in tb_dma_available_credits()
1515 	credits -= port->dma_credits;  in tb_dma_available_credits()
1517 	return credits > 0 ? credits : 0;  in tb_dma_available_credits()
1520 static int tb_dma_reserve_credits(struct tb_path_hop *hop, unsigned int credits)  in tb_dma_reserve_credits()  argument
1534 		while (credits > available)  in tb_dma_reserve_credits()
1535 			credits--;  in tb_dma_reserve_credits()
1538 			    credits);  in tb_dma_reserve_credits()
1540 		port->dma_credits += credits;  in tb_dma_reserve_credits()
1543 			credits = port->bonded ? 14 : 6;  in tb_dma_reserve_credits()
1545 			credits = min(port->total_credits, credits);  in tb_dma_reserve_credits()
1548 	hop->initial_credits = credits;  in tb_dma_reserve_credits()
1553 static int tb_dma_init_rx_path(struct tb_path *path, unsigned int credits)  in tb_dma_init_rx_path()  argument
1572 	tmp = min(tb_usable_credits(hop->in_port), credits);  in tb_dma_init_rx_path()
1579 		ret = tb_dma_reserve_credits(&path->hops[i], credits);  in tb_dma_init_rx_path()
1588 static int tb_dma_init_tx_path(struct tb_path *path, unsigned int credits)  in tb_dma_init_tx_path()  argument
1603 		ret = tb_dma_reserve_credits(hop, credits);  in tb_dma_init_tx_path()
1664 	int credits;  in tb_tunnel_alloc_dma()  local
1686 	credits = min_not_zero(dma_credits, nhi->sw->max_dma_credits);  in tb_tunnel_alloc_dma()
1694 		if (tb_dma_init_rx_path(path, credits)) {  in tb_tunnel_alloc_dma()
1706 		if (tb_dma_init_tx_path(path, credits)) {  in tb_tunnel_alloc_dma()
1916 	unsigned int credits;  in tb_usb3_init_credits()  local
1919 		credits = sw->max_usb3_credits;  in tb_usb3_init_credits()
1922 			credits = port->bonded ? 32 : 16;  in tb_usb3_init_credits()
1924 			credits = 7;  in tb_usb3_init_credits()
1927 	hop->initial_credits = credits;  in tb_usb3_init_credits()