2 /* vcc.c: sun4v virtual channel concentrator
17 #define DRV_MODULE_NAME		"vcc"
52 /* Microseconds that thread will delay waiting for a vcc port ref */
62 static const char vcc_driver_name[] = "vcc";
63 static const char vcc_device_node[] = "vcc";
116  * vcc_table_add() - Add VCC port to the VCC table
117  * @port: pointer to the VCC port
119  * Return: index of the port in the VCC table on success,
143  * vcc_table_remove() - Removes a VCC port from the VCC table
144  * @index: Index into the VCC table
159  * vcc_get() - Gets a reference to VCC port
160  * @index: Index into the VCC table
163  * Return: reference to the VCC port, if found
209  * vcc_put() - Returns a reference to VCC port
210  * @port: pointer to VCC port
240  * vcc_get_ne() - Get a non-exclusive reference to VCC port
241  * @index: Index into the VCC table
243  * Gets a non-exclusive reference to VCC port, if it's not removed
245  * Return: pointer to the VCC port, if found
324 		vccdbg("VCC: reset rx q: rv=%d\n", rv);  in vcc_ldc_read()
341 		vccdbg("VCC: ldc_read()=%d\n", rv);  in vcc_ldc_read()
351 			pr_err("VCC: unknown msg [%02x:%02x:%04x:%08x]\n",  in vcc_ldc_read()
418 		vccdbg("VCC: ldc_write()=%d\n", rv);  in vcc_tx_timer()
435  * @arg: VCC private data
438  * Handles LDC events for VCC
465 		pr_err("VCC: unexpected LDC event(%d)\n", event);  in vcc_event()
512 	vccdbg("VCC: ldc_write(%ld)=%d\n", sizeof(pkt.tag), rv);  in vcc_send_ctl()
557  * vcc_probe() - Initialize VCC port
558  * @vdev: Pointer to VIO device of the new VCC port
561  * Initializes a VCC port to receive serial console data from
578 	vccdbg("VCC: name=%s\n", dev_name(&vdev->dev));  in vcc_probe()
581 		pr_err("VCC: TTY driver not registered\n");  in vcc_probe()
611 		pr_err("VCC: no more TTY indices left for allocation\n");  in vcc_probe()
616 	/* Register the device using VCC table index as TTY index */  in vcc_probe()
632 	domain = mdesc_get_property(hp, node, "vcc-domain-name", NULL);  in vcc_probe()
682  * vcc_remove() - Terminate a VCC port
683  * @vdev: Pointer to VIO device of the VCC port
685  * Terminates a VCC port. Sets up the teardown of TTY and
707 	/* Get exclusive reference to VCC, ensures that there are no other  in vcc_remove()
737 		.type = "vcc-port",
747 	.name		= "vcc",
755 		pr_err("VCC: open: Invalid TTY handle\n");  in vcc_open()
764 		pr_err("VCC: open: Failed to find VCC port\n");  in vcc_open()
769 		pr_err("VCC: open: LDC channel not configured\n");  in vcc_open()
778 		pr_err("VCC: open: TTY port not found\n");  in vcc_open()
783 		pr_err("VCC: open: TTY ops not defined\n");  in vcc_open()
793 		pr_err("VCC: close: Invalid TTY handle\n");  in vcc_close()
801 		pr_err("VCC: close: TTY port not found\n");  in vcc_close()
825 		pr_err("VCC: hangup: Invalid TTY handle\n");  in vcc_hangup()
831 		pr_err("VCC: hangup: Failed to find VCC port\n");  in vcc_hangup()
836 		pr_err("VCC: hangup: TTY port not found\n");  in vcc_hangup()
859 		pr_err("VCC: write: Invalid TTY handle\n");  in vcc_write()
865 		pr_err("VCC: write: Failed to find VCC port");  in vcc_write()
891 		/* Since we know we have enough room in VCC buffer for tosend  in vcc_write()
896 		vccdbg("VCC: write: ldc_write(%d)=%d\n",  in vcc_write()
913 	vccdbg("VCC: write: total=%d rv=%d", total_sent, rv);  in vcc_write()
924 		pr_err("VCC: write_room: Invalid TTY handle\n");  in vcc_write_room()
930 		pr_err("VCC: write_room: Failed to find VCC port\n");  in vcc_write_room()
947 		pr_err("VCC: chars_in_buffer: Invalid TTY handle\n");  in vcc_chars_in_buffer()
953 		pr_err("VCC: chars_in_buffer: Failed to find VCC port\n");  in vcc_chars_in_buffer()
970 		pr_err("VCC: break_ctl: Invalid TTY handle\n");  in vcc_break_ctl()
976 		pr_err("VCC: break_ctl: Failed to find VCC port\n");  in vcc_break_ctl()
1005 		pr_err("VCC: install: Invalid TTY handle\n");  in vcc_install()
1022 		pr_err("VCC: install: Failed to find VCC port\n");  in vcc_install()
1044 		pr_err("VCC: cleanup: Invalid TTY handle\n");  in vcc_cleanup()
1085 	pr_info("VCC: %s\n", version);  in vcc_tty_init()
1089 		pr_err("VCC: TTY driver alloc failed\n");  in vcc_tty_init()
1104 		pr_err("VCC: TTY driver registration failed\n");  in vcc_tty_init()
1110 	vccdbg("VCC: TTY driver registered\n");  in vcc_tty_init()
1119 	vccdbg("VCC: TTY driver unregistered\n");  in vcc_tty_exit()
1130 		pr_err("VCC: TTY init failed\n");  in vcc_init()
1136 		pr_err("VCC: VIO driver registration failed\n");  in vcc_init()
1139 		vccdbg("VCC: VIO driver registered successfully\n");  in vcc_init()
1148 	vccdbg("VCC: VIO driver unregistered\n");  in vcc_exit()
1150 	vccdbg("VCC: TTY driver unregistered\n");  in vcc_exit()