From 248285501ea251379dd449316bf5af78362ae638 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Wed, 28 Nov 2007 16:21:11 -0800 Subject: ps3: prefix all ps3-specific kernel modules with `ps3-' - vuart.ko -> ps3-vuart.ko - sys-manager.ko -> ps3-sys-manager.ko Signed-off-by: Geert Uytterhoeven Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/ps3/Makefile | 4 +- drivers/ps3/ps3-sys-manager.c | 702 +++++++++++++++++++++++ drivers/ps3/ps3-vuart.c | 1271 +++++++++++++++++++++++++++++++++++++++++ drivers/ps3/sys-manager.c | 702 ----------------------- drivers/ps3/vuart.c | 1271 ----------------------------------------- 5 files changed, 1975 insertions(+), 1975 deletions(-) create mode 100644 drivers/ps3/ps3-sys-manager.c create mode 100644 drivers/ps3/ps3-vuart.c delete mode 100644 drivers/ps3/sys-manager.c delete mode 100644 drivers/ps3/vuart.c (limited to 'drivers/ps3') diff --git a/drivers/ps3/Makefile b/drivers/ps3/Makefile index 746031de2195..1f5a2d33bf5b 100644 --- a/drivers/ps3/Makefile +++ b/drivers/ps3/Makefile @@ -1,6 +1,6 @@ -obj-$(CONFIG_PS3_VUART) += vuart.o +obj-$(CONFIG_PS3_VUART) += ps3-vuart.o obj-$(CONFIG_PS3_PS3AV) += ps3av_mod.o ps3av_mod-objs += ps3av.o ps3av_cmd.o obj-$(CONFIG_PPC_PS3) += sys-manager-core.o -obj-$(CONFIG_PS3_SYS_MANAGER) += sys-manager.o +obj-$(CONFIG_PS3_SYS_MANAGER) += ps3-sys-manager.o obj-$(CONFIG_PS3_STORAGE) += ps3stor_lib.o diff --git a/drivers/ps3/ps3-sys-manager.c b/drivers/ps3/ps3-sys-manager.c new file mode 100644 index 000000000000..8461b08ab9fb --- /dev/null +++ b/drivers/ps3/ps3-sys-manager.c @@ -0,0 +1,702 @@ +/* + * PS3 System Manager. + * + * Copyright (C) 2007 Sony Computer Entertainment Inc. + * Copyright 2007 Sony Corp. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include +#include +#include +#include + +#include +#include + +#include "vuart.h" + +MODULE_AUTHOR("Sony Corporation"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("PS3 System Manager"); + +/** + * ps3_sys_manager - PS3 system manager driver. + * + * The system manager provides an asynchronous system event notification + * mechanism for reporting events like thermal alert and button presses to + * guests. It also provides support to control system shutdown and startup. + * + * The actual system manager is implemented as an application running in the + * system policy module in lpar_1. Guests communicate with the system manager + * through port 2 of the vuart using a simple packet message protocol. + * Messages are comprised of a fixed field header followed by a message + * specific payload. + */ + +/** + * struct ps3_sys_manager_header - System manager message header. + * @version: Header version, currently 1. + * @size: Header size in bytes, curently 16. + * @payload_size: Message payload size in bytes. + * @service_id: Message type, one of enum ps3_sys_manager_service_id. + * @request_tag: Unique number to identify reply. + */ + +struct ps3_sys_manager_header { + /* version 1 */ + u8 version; + u8 size; + u16 reserved_1; + u32 payload_size; + u16 service_id; + u16 reserved_2; + u32 request_tag; +}; + +#define dump_sm_header(_h) _dump_sm_header(_h, __func__, __LINE__) +static void __maybe_unused _dump_sm_header( + const struct ps3_sys_manager_header *h, const char *func, int line) +{ + pr_debug("%s:%d: version: %xh\n", func, line, h->version); + pr_debug("%s:%d: size: %xh\n", func, line, h->size); + pr_debug("%s:%d: payload_size: %xh\n", func, line, h->payload_size); + pr_debug("%s:%d: service_id: %xh\n", func, line, h->service_id); + pr_debug("%s:%d: request_tag: %xh\n", func, line, h->request_tag); +} + +/** + * @PS3_SM_RX_MSG_LEN_MIN - Shortest received message length. + * @PS3_SM_RX_MSG_LEN_MAX - Longest received message length. + * + * Currently all messages received from the system manager are either + * (16 bytes header + 8 bytes payload = 24 bytes) or (16 bytes header + * + 16 bytes payload = 32 bytes). This knowlege is used to simplify + * the logic. + */ + +enum { + PS3_SM_RX_MSG_LEN_MIN = 24, + PS3_SM_RX_MSG_LEN_MAX = 32, +}; + +/** + * enum ps3_sys_manager_service_id - Message header service_id. + * @PS3_SM_SERVICE_ID_REQUEST: guest --> sys_manager. + * @PS3_SM_SERVICE_ID_REQUEST_ERROR: guest <-- sys_manager. + * @PS3_SM_SERVICE_ID_COMMAND: guest <-- sys_manager. + * @PS3_SM_SERVICE_ID_RESPONSE: guest --> sys_manager. + * @PS3_SM_SERVICE_ID_SET_ATTR: guest --> sys_manager. + * @PS3_SM_SERVICE_ID_EXTERN_EVENT: guest <-- sys_manager. + * @PS3_SM_SERVICE_ID_SET_NEXT_OP: guest --> sys_manager. + * + * PS3_SM_SERVICE_ID_REQUEST_ERROR is returned for invalid data values in a + * a PS3_SM_SERVICE_ID_REQUEST message. It also seems to be returned when + * a REQUEST message is sent at the wrong time. + */ + +enum ps3_sys_manager_service_id { + /* version 1 */ + PS3_SM_SERVICE_ID_REQUEST = 1, + PS3_SM_SERVICE_ID_RESPONSE = 2, + PS3_SM_SERVICE_ID_COMMAND = 3, + PS3_SM_SERVICE_ID_EXTERN_EVENT = 4, + PS3_SM_SERVICE_ID_SET_NEXT_OP = 5, + PS3_SM_SERVICE_ID_REQUEST_ERROR = 6, + PS3_SM_SERVICE_ID_SET_ATTR = 8, +}; + +/** + * enum ps3_sys_manager_attr - Notification attribute (bit position mask). + * @PS3_SM_ATTR_POWER: Power button. + * @PS3_SM_ATTR_RESET: Reset button, not available on retail console. + * @PS3_SM_ATTR_THERMAL: Sytem thermal alert. + * @PS3_SM_ATTR_CONTROLLER: Remote controller event. + * @PS3_SM_ATTR_ALL: Logical OR of all. + * + * The guest tells the system manager which events it is interested in receiving + * notice of by sending the system manager a logical OR of notification + * attributes via the ps3_sys_manager_send_attr() routine. + */ + +enum ps3_sys_manager_attr { + /* version 1 */ + PS3_SM_ATTR_POWER = 1, + PS3_SM_ATTR_RESET = 2, + PS3_SM_ATTR_THERMAL = 4, + PS3_SM_ATTR_CONTROLLER = 8, /* bogus? */ + PS3_SM_ATTR_ALL = 0x0f, +}; + +/** + * enum ps3_sys_manager_event - External event type, reported by system manager. + * @PS3_SM_EVENT_POWER_PRESSED: payload.value not used. + * @PS3_SM_EVENT_POWER_RELEASED: payload.value = time pressed in millisec. + * @PS3_SM_EVENT_RESET_PRESSED: payload.value not used. + * @PS3_SM_EVENT_RESET_RELEASED: payload.value = time pressed in millisec. + * @PS3_SM_EVENT_THERMAL_ALERT: payload.value = thermal zone id. + * @PS3_SM_EVENT_THERMAL_CLEARED: payload.value = thermal zone id. + */ + +enum ps3_sys_manager_event { + /* version 1 */ + PS3_SM_EVENT_POWER_PRESSED = 3, + PS3_SM_EVENT_POWER_RELEASED = 4, + PS3_SM_EVENT_RESET_PRESSED = 5, + PS3_SM_EVENT_RESET_RELEASED = 6, + PS3_SM_EVENT_THERMAL_ALERT = 7, + PS3_SM_EVENT_THERMAL_CLEARED = 8, + /* no info on controller events */ +}; + +/** + * enum ps3_sys_manager_next_op - Operation to perform after lpar is destroyed. + */ + +enum ps3_sys_manager_next_op { + /* version 3 */ + PS3_SM_NEXT_OP_SYS_SHUTDOWN = 1, + PS3_SM_NEXT_OP_SYS_REBOOT = 2, + PS3_SM_NEXT_OP_LPAR_REBOOT = 0x82, +}; + +/** + * enum ps3_sys_manager_wake_source - Next-op wakeup source (bit position mask). + * @PS3_SM_WAKE_DEFAULT: Disk insert, power button, eject button, IR + * controller, and bluetooth controller. + * @PS3_SM_WAKE_RTC: + * @PS3_SM_WAKE_RTC_ERROR: + * @PS3_SM_WAKE_P_O_R: Power on reset. + * + * Additional wakeup sources when specifying PS3_SM_NEXT_OP_SYS_SHUTDOWN. + * System will always wake from the PS3_SM_WAKE_DEFAULT sources. + */ + +enum ps3_sys_manager_wake_source { + /* version 3 */ + PS3_SM_WAKE_DEFAULT = 0, + PS3_SM_WAKE_RTC = 0x00000040, + PS3_SM_WAKE_RTC_ERROR = 0x00000080, + PS3_SM_WAKE_P_O_R = 0x10000000, +}; + +/** + * enum ps3_sys_manager_cmd - Command from system manager to guest. + * + * The guest completes the actions needed, then acks or naks the command via + * ps3_sys_manager_send_response(). In the case of @PS3_SM_CMD_SHUTDOWN, + * the guest must be fully prepared for a system poweroff prior to acking the + * command. + */ + +enum ps3_sys_manager_cmd { + /* version 1 */ + PS3_SM_CMD_SHUTDOWN = 1, /* shutdown guest OS */ +}; + +/** + * ps3_sm_force_power_off - Poweroff helper. + * + * A global variable used to force a poweroff when the power button has + * been pressed irrespective of how init handles the ctrl_alt_del signal. + * + */ + +static unsigned int ps3_sm_force_power_off; + +/** + * ps3_sys_manager_write - Helper to write a two part message to the vuart. + * + */ + +static int ps3_sys_manager_write(struct ps3_system_bus_device *dev, + const struct ps3_sys_manager_header *header, const void *payload) +{ + int result; + + BUG_ON(header->version != 1); + BUG_ON(header->size != 16); + BUG_ON(header->payload_size != 8 && header->payload_size != 16); + BUG_ON(header->service_id > 8); + + result = ps3_vuart_write(dev, header, + sizeof(struct ps3_sys_manager_header)); + + if (!result) + result = ps3_vuart_write(dev, payload, header->payload_size); + + return result; +} + +/** + * ps3_sys_manager_send_attr - Send a 'set attribute' to the system manager. + * + */ + +static int ps3_sys_manager_send_attr(struct ps3_system_bus_device *dev, + enum ps3_sys_manager_attr attr) +{ + struct ps3_sys_manager_header header; + struct { + u8 version; + u8 reserved_1[3]; + u32 attribute; + } payload; + + BUILD_BUG_ON(sizeof(payload) != 8); + + dev_dbg(&dev->core, "%s:%d: %xh\n", __func__, __LINE__, attr); + + memset(&header, 0, sizeof(header)); + header.version = 1; + header.size = 16; + header.payload_size = 16; + header.service_id = PS3_SM_SERVICE_ID_SET_ATTR; + + memset(&payload, 0, sizeof(payload)); + payload.version = 1; + payload.attribute = attr; + + return ps3_sys_manager_write(dev, &header, &payload); +} + +/** + * ps3_sys_manager_send_next_op - Send a 'set next op' to the system manager. + * + * Tell the system manager what to do after this lpar is destroyed. + */ + +static int ps3_sys_manager_send_next_op(struct ps3_system_bus_device *dev, + enum ps3_sys_manager_next_op op, + enum ps3_sys_manager_wake_source wake_source) +{ + struct ps3_sys_manager_header header; + struct { + u8 version; + u8 type; + u8 gos_id; + u8 reserved_1; + u32 wake_source; + u8 reserved_2[8]; + } payload; + + BUILD_BUG_ON(sizeof(payload) != 16); + + dev_dbg(&dev->core, "%s:%d: (%xh)\n", __func__, __LINE__, op); + + memset(&header, 0, sizeof(header)); + header.version = 1; + header.size = 16; + header.payload_size = 16; + header.service_id = PS3_SM_SERVICE_ID_SET_NEXT_OP; + + memset(&payload, 0, sizeof(payload)); + payload.version = 3; + payload.type = op; + payload.gos_id = 3; /* other os */ + payload.wake_source = wake_source; + + return ps3_sys_manager_write(dev, &header, &payload); +} + +/** + * ps3_sys_manager_send_request_shutdown - Send 'request' to the system manager. + * + * The guest sends this message to request an operation or action of the system + * manager. The reply is a command message from the system manager. In the + * command handler the guest performs the requested operation. The result of + * the command is then communicated back to the system manager with a response + * message. + * + * Currently, the only supported request is the 'shutdown self' request. + */ + +static int ps3_sys_manager_send_request_shutdown( + struct ps3_system_bus_device *dev) +{ + struct ps3_sys_manager_header header; + struct { + u8 version; + u8 type; + u8 gos_id; + u8 reserved_1[13]; + } payload; + + BUILD_BUG_ON(sizeof(payload) != 16); + + dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); + + memset(&header, 0, sizeof(header)); + header.version = 1; + header.size = 16; + header.payload_size = 16; + header.service_id = PS3_SM_SERVICE_ID_REQUEST; + + memset(&payload, 0, sizeof(payload)); + payload.version = 1; + payload.type = 1; /* shutdown */ + payload.gos_id = 0; /* self */ + + return ps3_sys_manager_write(dev, &header, &payload); +} + +/** + * ps3_sys_manager_send_response - Send a 'response' to the system manager. + * @status: zero = success, others fail. + * + * The guest sends this message to the system manager to acnowledge success or + * failure of a command sent by the system manager. + */ + +static int ps3_sys_manager_send_response(struct ps3_system_bus_device *dev, + u64 status) +{ + struct ps3_sys_manager_header header; + struct { + u8 version; + u8 reserved_1[3]; + u8 status; + u8 reserved_2[11]; + } payload; + + BUILD_BUG_ON(sizeof(payload) != 16); + + dev_dbg(&dev->core, "%s:%d: (%s)\n", __func__, __LINE__, + (status ? "nak" : "ack")); + + memset(&header, 0, sizeof(header)); + header.version = 1; + header.size = 16; + header.payload_size = 16; + header.service_id = PS3_SM_SERVICE_ID_RESPONSE; + + memset(&payload, 0, sizeof(payload)); + payload.version = 1; + payload.status = status; + + return ps3_sys_manager_write(dev, &header, &payload); +} + +/** + * ps3_sys_manager_handle_event - Second stage event msg handler. + * + */ + +static int ps3_sys_manager_handle_event(struct ps3_system_bus_device *dev) +{ + int result; + struct { + u8 version; + u8 type; + u8 reserved_1[2]; + u32 value; + u8 reserved_2[8]; + } event; + + BUILD_BUG_ON(sizeof(event) != 16); + + result = ps3_vuart_read(dev, &event, sizeof(event)); + BUG_ON(result && "need to retry here"); + + if (event.version != 1) { + dev_dbg(&dev->core, "%s:%d: unsupported event version (%u)\n", + __func__, __LINE__, event.version); + return -EIO; + } + + switch (event.type) { + case PS3_SM_EVENT_POWER_PRESSED: + dev_dbg(&dev->core, "%s:%d: POWER_PRESSED\n", + __func__, __LINE__); + ps3_sm_force_power_off = 1; + /* + * A memory barrier is use here to sync memory since + * ps3_sys_manager_final_restart() could be called on + * another cpu. + */ + wmb(); + kill_cad_pid(SIGINT, 1); /* ctrl_alt_del */ + break; + case PS3_SM_EVENT_POWER_RELEASED: + dev_dbg(&dev->core, "%s:%d: POWER_RELEASED (%u ms)\n", + __func__, __LINE__, event.value); + break; + case PS3_SM_EVENT_RESET_PRESSED: + dev_dbg(&dev->core, "%s:%d: RESET_PRESSED\n", + __func__, __LINE__); + ps3_sm_force_power_off = 0; + /* + * A memory barrier is use here to sync memory since + * ps3_sys_manager_final_restart() could be called on + * another cpu. + */ + wmb(); + kill_cad_pid(SIGINT, 1); /* ctrl_alt_del */ + break; + case PS3_SM_EVENT_RESET_RELEASED: + dev_dbg(&dev->core, "%s:%d: RESET_RELEASED (%u ms)\n", + __func__, __LINE__, event.value); + break; + case PS3_SM_EVENT_THERMAL_ALERT: + dev_dbg(&dev->core, "%s:%d: THERMAL_ALERT (zone %u)\n", + __func__, __LINE__, event.value); + printk(KERN_INFO "PS3 Thermal Alert Zone %u\n", event.value); + break; + case PS3_SM_EVENT_THERMAL_CLEARED: + dev_dbg(&dev->core, "%s:%d: THERMAL_CLEARED (zone %u)\n", + __func__, __LINE__, event.value); + break; + default: + dev_dbg(&dev->core, "%s:%d: unknown event (%u)\n", + __func__, __LINE__, event.type); + return -EIO; + } + + return 0; +} +/** + * ps3_sys_manager_handle_cmd - Second stage command msg handler. + * + * The system manager sends this in reply to a 'request' message from the guest. + */ + +static int ps3_sys_manager_handle_cmd(struct ps3_system_bus_device *dev) +{ + int result; + struct { + u8 version; + u8 type; + u8 reserved_1[14]; + } cmd; + + BUILD_BUG_ON(sizeof(cmd) != 16); + + dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); + + result = ps3_vuart_read(dev, &cmd, sizeof(cmd)); + BUG_ON(result && "need to retry here"); + + if(result) + return result; + + if (cmd.version != 1) { + dev_dbg(&dev->core, "%s:%d: unsupported cmd version (%u)\n", + __func__, __LINE__, cmd.version); + return -EIO; + } + + if (cmd.type != PS3_SM_CMD_SHUTDOWN) { + dev_dbg(&dev->core, "%s:%d: unknown cmd (%u)\n", + __func__, __LINE__, cmd.type); + return -EIO; + } + + ps3_sys_manager_send_response(dev, 0); + return 0; +} + +/** + * ps3_sys_manager_handle_msg - First stage msg handler. + * + * Can be called directly to manually poll vuart and pump message handler. + */ + +static int ps3_sys_manager_handle_msg(struct ps3_system_bus_device *dev) +{ + int result; + struct ps3_sys_manager_header header; + + result = ps3_vuart_read(dev, &header, + sizeof(struct ps3_sys_manager_header)); + + if(result) + return result; + + if (header.version != 1) { + dev_dbg(&dev->core, "%s:%d: unsupported header version (%u)\n", + __func__, __LINE__, header.version); + dump_sm_header(&header); + goto fail_header; + } + + BUILD_BUG_ON(sizeof(header) != 16); + + if (header.size != 16 || (header.payload_size != 8 + && header.payload_size != 16)) { + dump_sm_header(&header); + BUG(); + } + + switch (header.service_id) { + case PS3_SM_SERVICE_ID_EXTERN_EVENT: + dev_dbg(&dev->core, "%s:%d: EVENT\n", __func__, __LINE__); + return ps3_sys_manager_handle_event(dev); + case PS3_SM_SERVICE_ID_COMMAND: + dev_dbg(&dev->core, "%s:%d: COMMAND\n", __func__, __LINE__); + return ps3_sys_manager_handle_cmd(dev); + case PS3_SM_SERVICE_ID_REQUEST_ERROR: + dev_dbg(&dev->core, "%s:%d: REQUEST_ERROR\n", __func__, + __LINE__); + dump_sm_header(&header); + break; + default: + dev_dbg(&dev->core, "%s:%d: unknown service_id (%u)\n", + __func__, __LINE__, header.service_id); + break; + } + goto fail_id; + +fail_header: + ps3_vuart_clear_rx_bytes(dev, 0); + return -EIO; +fail_id: + ps3_vuart_clear_rx_bytes(dev, header.payload_size); + return -EIO; +} + +/** + * ps3_sys_manager_final_power_off - The final platform machine_power_off routine. + * + * This routine never returns. The routine disables asynchronous vuart reads + * then spins calling ps3_sys_manager_handle_msg() to receive and acknowledge + * the shutdown command sent from the system manager. Soon after the + * acknowledgement is sent the lpar is destroyed by the HV. This routine + * should only be called from ps3_power_off() through + * ps3_sys_manager_ops.power_off. + */ + +static void ps3_sys_manager_final_power_off(struct ps3_system_bus_device *dev) +{ + BUG_ON(!dev); + + dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); + + ps3_vuart_cancel_async(dev); + + ps3_sys_manager_send_next_op(dev, PS3_SM_NEXT_OP_SYS_SHUTDOWN, + PS3_SM_WAKE_DEFAULT); + ps3_sys_manager_send_request_shutdown(dev); + + printk(KERN_EMERG "System Halted, OK to turn off power\n"); + + while(1) + ps3_sys_manager_handle_msg(dev); +} + +/** + * ps3_sys_manager_final_restart - The final platform machine_restart routine. + * + * This routine never returns. The routine disables asynchronous vuart reads + * then spins calling ps3_sys_manager_handle_msg() to receive and acknowledge + * the shutdown command sent from the system manager. Soon after the + * acknowledgement is sent the lpar is destroyed by the HV. This routine + * should only be called from ps3_restart() through ps3_sys_manager_ops.restart. + */ + +static void ps3_sys_manager_final_restart(struct ps3_system_bus_device *dev) +{ + BUG_ON(!dev); + + dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); + + /* Check if we got here via a power button event. */ + + if (ps3_sm_force_power_off) { + dev_dbg(&dev->core, "%s:%d: forcing poweroff\n", + __func__, __LINE__); + ps3_sys_manager_final_power_off(dev); + } + + ps3_vuart_cancel_async(dev); + + ps3_sys_manager_send_attr(dev, 0); + ps3_sys_manager_send_next_op(dev, PS3_SM_NEXT_OP_LPAR_REBOOT, + PS3_SM_WAKE_DEFAULT); + ps3_sys_manager_send_request_shutdown(dev); + + printk(KERN_EMERG "System Halted, OK to turn off power\n"); + + while(1) + ps3_sys_manager_handle_msg(dev); +} + +/** + * ps3_sys_manager_work - Asynchronous read handler. + * + * Signaled when PS3_SM_RX_MSG_LEN_MIN bytes arrive at the vuart port. + */ + +static void ps3_sys_manager_work(struct ps3_system_bus_device *dev) +{ + ps3_sys_manager_handle_msg(dev); + ps3_vuart_read_async(dev, PS3_SM_RX_MSG_LEN_MIN); +} + +static int ps3_sys_manager_probe(struct ps3_system_bus_device *dev) +{ + int result; + struct ps3_sys_manager_ops ops; + + dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); + + ops.power_off = ps3_sys_manager_final_power_off; + ops.restart = ps3_sys_manager_final_restart; + ops.dev = dev; + + /* ps3_sys_manager_register_ops copies ops. */ + + ps3_sys_manager_register_ops(&ops); + + result = ps3_sys_manager_send_attr(dev, PS3_SM_ATTR_ALL); + BUG_ON(result); + + result = ps3_vuart_read_async(dev, PS3_SM_RX_MSG_LEN_MIN); + BUG_ON(result); + + return result; +} + +static int ps3_sys_manager_remove(struct ps3_system_bus_device *dev) +{ + dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); + return 0; +} + +static void ps3_sys_manager_shutdown(struct ps3_system_bus_device *dev) +{ + dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); +} + +static struct ps3_vuart_port_driver ps3_sys_manager = { + .core.match_id = PS3_MATCH_ID_SYSTEM_MANAGER, + .core.core.name = "ps3_sys_manager", + .probe = ps3_sys_manager_probe, + .remove = ps3_sys_manager_remove, + .shutdown = ps3_sys_manager_shutdown, + .work = ps3_sys_manager_work, +}; + +static int __init ps3_sys_manager_init(void) +{ + if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) + return -ENODEV; + + return ps3_vuart_port_driver_register(&ps3_sys_manager); +} + +module_init(ps3_sys_manager_init); +/* Module remove not supported. */ + +MODULE_ALIAS(PS3_MODULE_ALIAS_SYSTEM_MANAGER); diff --git a/drivers/ps3/ps3-vuart.c b/drivers/ps3/ps3-vuart.c new file mode 100644 index 000000000000..9dea585ef806 --- /dev/null +++ b/drivers/ps3/ps3-vuart.c @@ -0,0 +1,1271 @@ +/* + * PS3 virtual uart + * + * Copyright (C) 2006 Sony Computer Entertainment Inc. + * Copyright 2006 Sony Corp. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "vuart.h" + +MODULE_AUTHOR("Sony Corporation"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("PS3 vuart"); + +/** + * vuart - An inter-partition data link service. + * port 0: PS3 AV Settings. + * port 2: PS3 System Manager. + * + * The vuart provides a bi-directional byte stream data link between logical + * partitions. Its primary role is as a communications link between the guest + * OS and the system policy module. The current HV does not support any + * connections other than those listed. + */ + +enum {PORT_COUNT = 3,}; + +enum vuart_param { + PARAM_TX_TRIGGER = 0, + PARAM_RX_TRIGGER = 1, + PARAM_INTERRUPT_MASK = 2, + PARAM_RX_BUF_SIZE = 3, /* read only */ + PARAM_RX_BYTES = 4, /* read only */ + PARAM_TX_BUF_SIZE = 5, /* read only */ + PARAM_TX_BYTES = 6, /* read only */ + PARAM_INTERRUPT_STATUS = 7, /* read only */ +}; + +enum vuart_interrupt_bit { + INTERRUPT_BIT_TX = 0, + INTERRUPT_BIT_RX = 1, + INTERRUPT_BIT_DISCONNECT = 2, +}; + +enum vuart_interrupt_mask { + INTERRUPT_MASK_TX = 1, + INTERRUPT_MASK_RX = 2, + INTERRUPT_MASK_DISCONNECT = 4, +}; + +/** + * struct ps3_vuart_port_priv - private vuart device data. + */ + +struct ps3_vuart_port_priv { + u64 interrupt_mask; + + struct { + spinlock_t lock; + struct list_head head; + } tx_list; + struct { + struct ps3_vuart_work work; + unsigned long bytes_held; + spinlock_t lock; + struct list_head head; + } rx_list; + struct ps3_vuart_stats stats; +}; + +static struct ps3_vuart_port_priv *to_port_priv( + struct ps3_system_bus_device *dev) +{ + BUG_ON(!dev); + BUG_ON(!dev->driver_priv); + return (struct ps3_vuart_port_priv *)dev->driver_priv; +} + +/** + * struct ports_bmp - bitmap indicating ports needing service. + * + * A 256 bit read only bitmap indicating ports needing service. Do not write + * to these bits. Must not cross a page boundary. + */ + +struct ports_bmp { + u64 status; + u64 unused[3]; +} __attribute__ ((aligned (32))); + +#define dump_ports_bmp(_b) _dump_ports_bmp(_b, __func__, __LINE__) +static void __maybe_unused _dump_ports_bmp( + const struct ports_bmp* bmp, const char* func, int line) +{ + pr_debug("%s:%d: ports_bmp: %016lxh\n", func, line, bmp->status); +} + +#define dump_port_params(_b) _dump_port_params(_b, __func__, __LINE__) +static void __maybe_unused _dump_port_params(unsigned int port_number, + const char* func, int line) +{ +#if defined(DEBUG) + static const char *strings[] = { + "tx_trigger ", + "rx_trigger ", + "interrupt_mask ", + "rx_buf_size ", + "rx_bytes ", + "tx_buf_size ", + "tx_bytes ", + "interrupt_status", + }; + int result; + unsigned int i; + u64 value; + + for (i = 0; i < ARRAY_SIZE(strings); i++) { + result = lv1_get_virtual_uart_param(port_number, i, &value); + + if (result) { + pr_debug("%s:%d: port_%u: %s failed: %s\n", func, line, + port_number, strings[i], ps3_result(result)); + continue; + } + pr_debug("%s:%d: port_%u: %s = %lxh\n", + func, line, port_number, strings[i], value); + } +#endif +} + +struct vuart_triggers { + unsigned long rx; + unsigned long tx; +}; + +int ps3_vuart_get_triggers(struct ps3_system_bus_device *dev, + struct vuart_triggers *trig) +{ + int result; + unsigned long size; + unsigned long val; + + result = lv1_get_virtual_uart_param(dev->port_number, + PARAM_TX_TRIGGER, &trig->tx); + + if (result) { + dev_dbg(&dev->core, "%s:%d: tx_trigger failed: %s\n", + __func__, __LINE__, ps3_result(result)); + return result; + } + + result = lv1_get_virtual_uart_param(dev->port_number, + PARAM_RX_BUF_SIZE, &size); + + if (result) { + dev_dbg(&dev->core, "%s:%d: tx_buf_size failed: %s\n", + __func__, __LINE__, ps3_result(result)); + return result; + } + + result = lv1_get_virtual_uart_param(dev->port_number, + PARAM_RX_TRIGGER, &val); + + if (result) { + dev_dbg(&dev->core, "%s:%d: rx_trigger failed: %s\n", + __func__, __LINE__, ps3_result(result)); + return result; + } + + trig->rx = size - val; + + dev_dbg(&dev->core, "%s:%d: tx %lxh, rx %lxh\n", __func__, __LINE__, + trig->tx, trig->rx); + + return result; +} + +int ps3_vuart_set_triggers(struct ps3_system_bus_device *dev, unsigned int tx, + unsigned int rx) +{ + int result; + unsigned long size; + + result = lv1_set_virtual_uart_param(dev->port_number, + PARAM_TX_TRIGGER, tx); + + if (result) { + dev_dbg(&dev->core, "%s:%d: tx_trigger failed: %s\n", + __func__, __LINE__, ps3_result(result)); + return result; + } + + result = lv1_get_virtual_uart_param(dev->port_number, + PARAM_RX_BUF_SIZE, &size); + + if (result) { + dev_dbg(&dev->core, "%s:%d: tx_buf_size failed: %s\n", + __func__, __LINE__, ps3_result(result)); + return result; + } + + result = lv1_set_virtual_uart_param(dev->port_number, + PARAM_RX_TRIGGER, size - rx); + + if (result) { + dev_dbg(&dev->core, "%s:%d: rx_trigger failed: %s\n", + __func__, __LINE__, ps3_result(result)); + return result; + } + + dev_dbg(&dev->core, "%s:%d: tx %xh, rx %xh\n", __func__, __LINE__, + tx, rx); + + return result; +} + +static int ps3_vuart_get_rx_bytes_waiting(struct ps3_system_bus_device *dev, + u64 *bytes_waiting) +{ + int result; + + result = lv1_get_virtual_uart_param(dev->port_number, + PARAM_RX_BYTES, bytes_waiting); + + if (result) + dev_dbg(&dev->core, "%s:%d: rx_bytes failed: %s\n", + __func__, __LINE__, ps3_result(result)); + + dev_dbg(&dev->core, "%s:%d: %lxh\n", __func__, __LINE__, + *bytes_waiting); + return result; +} + +/** + * ps3_vuart_set_interrupt_mask - Enable/disable the port interrupt sources. + * @dev: The struct ps3_system_bus_device instance. + * @bmp: Logical OR of enum vuart_interrupt_mask values. A zero bit disables. + */ + +static int ps3_vuart_set_interrupt_mask(struct ps3_system_bus_device *dev, + unsigned long mask) +{ + int result; + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + + dev_dbg(&dev->core, "%s:%d: %lxh\n", __func__, __LINE__, mask); + + priv->interrupt_mask = mask; + + result = lv1_set_virtual_uart_param(dev->port_number, + PARAM_INTERRUPT_MASK, priv->interrupt_mask); + + if (result) + dev_dbg(&dev->core, "%s:%d: interrupt_mask failed: %s\n", + __func__, __LINE__, ps3_result(result)); + + return result; +} + +static int ps3_vuart_get_interrupt_status(struct ps3_system_bus_device *dev, + unsigned long *status) +{ + int result; + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + u64 tmp; + + result = lv1_get_virtual_uart_param(dev->port_number, + PARAM_INTERRUPT_STATUS, &tmp); + + if (result) + dev_dbg(&dev->core, "%s:%d: interrupt_status failed: %s\n", + __func__, __LINE__, ps3_result(result)); + + *status = tmp & priv->interrupt_mask; + + dev_dbg(&dev->core, "%s:%d: m %lxh, s %lxh, m&s %lxh\n", + __func__, __LINE__, priv->interrupt_mask, tmp, *status); + + return result; +} + +int ps3_vuart_enable_interrupt_tx(struct ps3_system_bus_device *dev) +{ + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + + return (priv->interrupt_mask & INTERRUPT_MASK_TX) ? 0 + : ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask + | INTERRUPT_MASK_TX); +} + +int ps3_vuart_enable_interrupt_rx(struct ps3_system_bus_device *dev) +{ + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + + return (priv->interrupt_mask & INTERRUPT_MASK_RX) ? 0 + : ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask + | INTERRUPT_MASK_RX); +} + +int ps3_vuart_enable_interrupt_disconnect(struct ps3_system_bus_device *dev) +{ + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + + return (priv->interrupt_mask & INTERRUPT_MASK_DISCONNECT) ? 0 + : ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask + | INTERRUPT_MASK_DISCONNECT); +} + +int ps3_vuart_disable_interrupt_tx(struct ps3_system_bus_device *dev) +{ + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + + return (priv->interrupt_mask & INTERRUPT_MASK_TX) + ? ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask + & ~INTERRUPT_MASK_TX) : 0; +} + +int ps3_vuart_disable_interrupt_rx(struct ps3_system_bus_device *dev) +{ + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + + return (priv->interrupt_mask & INTERRUPT_MASK_RX) + ? ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask + & ~INTERRUPT_MASK_RX) : 0; +} + +int ps3_vuart_disable_interrupt_disconnect(struct ps3_system_bus_device *dev) +{ + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + + return (priv->interrupt_mask & INTERRUPT_MASK_DISCONNECT) + ? ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask + & ~INTERRUPT_MASK_DISCONNECT) : 0; +} + +/** + * ps3_vuart_raw_write - Low level write helper. + * @dev: The struct ps3_system_bus_device instance. + * + * Do not call ps3_vuart_raw_write directly, use ps3_vuart_write. + */ + +static int ps3_vuart_raw_write(struct ps3_system_bus_device *dev, + const void* buf, unsigned int bytes, unsigned long *bytes_written) +{ + int result; + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + + result = lv1_write_virtual_uart(dev->port_number, + ps3_mm_phys_to_lpar(__pa(buf)), bytes, bytes_written); + + if (result) { + dev_dbg(&dev->core, "%s:%d: lv1_write_virtual_uart failed: " + "%s\n", __func__, __LINE__, ps3_result(result)); + return result; + } + + priv->stats.bytes_written += *bytes_written; + + dev_dbg(&dev->core, "%s:%d: wrote %lxh/%xh=>%lxh\n", __func__, __LINE__, + *bytes_written, bytes, priv->stats.bytes_written); + + return result; +} + +/** + * ps3_vuart_raw_read - Low level read helper. + * @dev: The struct ps3_system_bus_device instance. + * + * Do not call ps3_vuart_raw_read directly, use ps3_vuart_read. + */ + +static int ps3_vuart_raw_read(struct ps3_system_bus_device *dev, void *buf, + unsigned int bytes, unsigned long *bytes_read) +{ + int result; + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + + dev_dbg(&dev->core, "%s:%d: %xh\n", __func__, __LINE__, bytes); + + result = lv1_read_virtual_uart(dev->port_number, + ps3_mm_phys_to_lpar(__pa(buf)), bytes, bytes_read); + + if (result) { + dev_dbg(&dev->core, "%s:%d: lv1_read_virtual_uart failed: %s\n", + __func__, __LINE__, ps3_result(result)); + return result; + } + + priv->stats.bytes_read += *bytes_read; + + dev_dbg(&dev->core, "%s:%d: read %lxh/%xh=>%lxh\n", __func__, __LINE__, + *bytes_read, bytes, priv->stats.bytes_read); + + return result; +} + +/** + * ps3_vuart_clear_rx_bytes - Discard bytes received. + * @dev: The struct ps3_system_bus_device instance. + * @bytes: Max byte count to discard, zero = all pending. + * + * Used to clear pending rx interrupt source. Will not block. + */ + +void ps3_vuart_clear_rx_bytes(struct ps3_system_bus_device *dev, + unsigned int bytes) +{ + int result; + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + u64 bytes_waiting; + void* tmp; + + result = ps3_vuart_get_rx_bytes_waiting(dev, &bytes_waiting); + + BUG_ON(result); + + bytes = bytes ? min(bytes, (unsigned int)bytes_waiting) : bytes_waiting; + + dev_dbg(&dev->core, "%s:%d: %u\n", __func__, __LINE__, bytes); + + if (!bytes) + return; + + /* Add some extra space for recently arrived data. */ + + bytes += 128; + + tmp = kmalloc(bytes, GFP_KERNEL); + + if (!tmp) + return; + + ps3_vuart_raw_read(dev, tmp, bytes, &bytes_waiting); + + kfree(tmp); + + /* Don't include these bytes in the stats. */ + + priv->stats.bytes_read -= bytes_waiting; +} +EXPORT_SYMBOL_GPL(ps3_vuart_clear_rx_bytes); + +/** + * struct list_buffer - An element for a port device fifo buffer list. + */ + +struct list_buffer { + struct list_head link; + const unsigned char *head; + const unsigned char *tail; + unsigned long dbg_number; + unsigned char data[]; +}; + +/** + * ps3_vuart_write - the entry point for writing data to a port + * @dev: The struct ps3_system_bus_device instance. + * + * If the port is idle on entry as much of the incoming data is written to + * the port as the port will accept. Otherwise a list buffer is created + * and any remaning incoming data is copied to that buffer. The buffer is + * then enqueued for transmision via the transmit interrupt. + */ + +int ps3_vuart_write(struct ps3_system_bus_device *dev, const void *buf, + unsigned int bytes) +{ + static unsigned long dbg_number; + int result; + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + unsigned long flags; + struct list_buffer *lb; + + dev_dbg(&dev->core, "%s:%d: %u(%xh) bytes\n", __func__, __LINE__, + bytes, bytes); + + spin_lock_irqsave(&priv->tx_list.lock, flags); + + if (list_empty(&priv->tx_list.head)) { + unsigned long bytes_written; + + result = ps3_vuart_raw_write(dev, buf, bytes, &bytes_written); + + spin_unlock_irqrestore(&priv->tx_list.lock, flags); + + if (result) { + dev_dbg(&dev->core, + "%s:%d: ps3_vuart_raw_write failed\n", + __func__, __LINE__); + return result; + } + + if (bytes_written == bytes) { + dev_dbg(&dev->core, "%s:%d: wrote %xh bytes\n", + __func__, __LINE__, bytes); + return 0; + } + + bytes -= bytes_written; + buf += bytes_written; + } else + spin_unlock_irqrestore(&priv->tx_list.lock, flags); + + lb = kmalloc(sizeof(struct list_buffer) + bytes, GFP_KERNEL); + + if (!lb) { + return -ENOMEM; + } + + memcpy(lb->data, buf, bytes); + lb->head = lb->data; + lb->tail = lb->data + bytes; + lb->dbg_number = ++dbg_number; + + spin_lock_irqsave(&priv->tx_list.lock, flags); + list_add_tail(&lb->link, &priv->tx_list.head); + ps3_vuart_enable_interrupt_tx(dev); + spin_unlock_irqrestore(&priv->tx_list.lock, flags); + + dev_dbg(&dev->core, "%s:%d: queued buf_%lu, %xh bytes\n", + __func__, __LINE__, lb->dbg_number, bytes); + + return 0; +} +EXPORT_SYMBOL_GPL(ps3_vuart_write); + +/** + * ps3_vuart_queue_rx_bytes - Queue waiting bytes into the buffer list. + * @dev: The struct ps3_system_bus_device instance. + * @bytes_queued: Number of bytes queued to the buffer list. + * + * Must be called with priv->rx_list.lock held. + */ + +static int ps3_vuart_queue_rx_bytes(struct ps3_system_bus_device *dev, + u64 *bytes_queued) +{ + static unsigned long dbg_number; + int result; + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + struct list_buffer *lb; + u64 bytes; + + *bytes_queued = 0; + + result = ps3_vuart_get_rx_bytes_waiting(dev, &bytes); + BUG_ON(result); + + if (result) + return -EIO; + + if (!bytes) + return 0; + + /* Add some extra space for recently arrived data. */ + + bytes += 128; + + lb = kmalloc(sizeof(struct list_buffer) + bytes, GFP_ATOMIC); + + if (!lb) + return -ENOMEM; + + ps3_vuart_raw_read(dev, lb->data, bytes, &bytes); + + lb->head = lb->data; + lb->tail = lb->data + bytes; + lb->dbg_number = ++dbg_number; + + list_add_tail(&lb->link, &priv->rx_list.head); + priv->rx_list.bytes_held += bytes; + + dev_dbg(&dev->core, "%s:%d: buf_%lu: queued %lxh bytes\n", + __func__, __LINE__, lb->dbg_number, bytes); + + *bytes_queued = bytes; + + return 0; +} + +/** + * ps3_vuart_read - The entry point for reading data from a port. + * + * Queue data waiting at the port, and if enough bytes to satisfy the request + * are held in the buffer list those bytes are dequeued and copied to the + * caller's buffer. Emptied list buffers are retiered. If the request cannot + * be statified by bytes held in the list buffers -EAGAIN is returned. + */ + +int ps3_vuart_read(struct ps3_system_bus_device *dev, void *buf, + unsigned int bytes) +{ + int result; + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + unsigned long flags; + struct list_buffer *lb, *n; + unsigned long bytes_read; + + dev_dbg(&dev->core, "%s:%d: %u(%xh) bytes\n", __func__, __LINE__, + bytes, bytes); + + spin_lock_irqsave(&priv->rx_list.lock, flags); + + /* Queue rx bytes here for polled reads. */ + + while (priv->rx_list.bytes_held < bytes) { + u64 tmp; + + result = ps3_vuart_queue_rx_bytes(dev, &tmp); + if (result || !tmp) { + dev_dbg(&dev->core, "%s:%d: starved for %lxh bytes\n", + __func__, __LINE__, + bytes - priv->rx_list.bytes_held); + spin_unlock_irqrestore(&priv->rx_list.lock, flags); + return -EAGAIN; + } + } + + list_for_each_entry_safe(lb, n, &priv->rx_list.head, link) { + bytes_read = min((unsigned int)(lb->tail - lb->head), bytes); + + memcpy(buf, lb->head, bytes_read); + buf += bytes_read; + bytes -= bytes_read; + priv->rx_list.bytes_held -= bytes_read; + + if (bytes_read < lb->tail - lb->head) { + lb->head += bytes_read; + dev_dbg(&dev->core, "%s:%d: buf_%lu: dequeued %lxh " + "bytes\n", __func__, __LINE__, lb->dbg_number, + bytes_read); + spin_unlock_irqrestore(&priv->rx_list.lock, flags); + return 0; + } + + dev_dbg(&dev->core, "%s:%d: buf_%lu: free, dequeued %lxh " + "bytes\n", __func__, __LINE__, lb->dbg_number, + bytes_read); + + list_del(&lb->link); + kfree(lb); + } + + spin_unlock_irqrestore(&priv->rx_list.lock, flags); + return 0; +} +EXPORT_SYMBOL_GPL(ps3_vuart_read); + +/** + * ps3_vuart_work - Asynchronous read handler. + */ + +static void ps3_vuart_work(struct work_struct *work) +{ + struct ps3_system_bus_device *dev = + ps3_vuart_work_to_system_bus_dev(work); + struct ps3_vuart_port_driver *drv = + ps3_system_bus_dev_to_vuart_drv(dev); + + BUG_ON(!drv); + drv->work(dev); +} + +int ps3_vuart_read_async(struct ps3_system_bus_device *dev, unsigned int bytes) +{ + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + unsigned long flags; + + if (priv->rx_list.work.trigger) { + dev_dbg(&dev->core, "%s:%d: warning, multiple calls\n", + __func__, __LINE__); + return -EAGAIN; + } + + BUG_ON(!bytes); + + PREPARE_WORK(&priv->rx_list.work.work, ps3_vuart_work); + + spin_lock_irqsave(&priv->rx_list.lock, flags); + if (priv->rx_list.bytes_held >= bytes) { + dev_dbg(&dev->core, "%s:%d: schedule_work %xh bytes\n", + __func__, __LINE__, bytes); + schedule_work(&priv->rx_list.work.work); + spin_unlock_irqrestore(&priv->rx_list.lock, flags); + return 0; + } + + priv->rx_list.work.trigger = bytes; + spin_unlock_irqrestore(&priv->rx_list.lock, flags); + + dev_dbg(&dev->core, "%s:%d: waiting for %u(%xh) bytes\n", __func__, + __LINE__, bytes, bytes); + + return 0; +} +EXPORT_SYMBOL_GPL(ps3_vuart_read_async); + +void ps3_vuart_cancel_async(struct ps3_system_bus_device *dev) +{ + to_port_priv(dev)->rx_list.work.trigger = 0; +} +EXPORT_SYMBOL_GPL(ps3_vuart_cancel_async); + +/** + * ps3_vuart_handle_interrupt_tx - third stage transmit interrupt handler + * + * Services the transmit interrupt for the port. Writes as much data from the + * buffer list as the port will accept. Retires any emptied list buffers and + * adjusts the final list buffer state for a partial write. + */ + +static int ps3_vuart_handle_interrupt_tx(struct ps3_system_bus_device *dev) +{ + int result = 0; + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + unsigned long flags; + struct list_buffer *lb, *n; + unsigned long bytes_total = 0; + + dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); + + spin_lock_irqsave(&priv->tx_list.lock, flags); + + list_for_each_entry_safe(lb, n, &priv->tx_list.head, link) { + + unsigned long bytes_written; + + result = ps3_vuart_raw_write(dev, lb->head, lb->tail - lb->head, + &bytes_written); + + if (result) { + dev_dbg(&dev->core, + "%s:%d: ps3_vuart_raw_write failed\n", + __func__, __LINE__); + break; + } + + bytes_total += bytes_written; + + if (bytes_written < lb->tail - lb->head) { + lb->head += bytes_written; + dev_dbg(&dev->core, + "%s:%d cleared buf_%lu, %lxh bytes\n", + __func__, __LINE__, lb->dbg_number, + bytes_written); + goto port_full; + } + + dev_dbg(&dev->core, "%s:%d free buf_%lu\n", __func__, __LINE__, + lb->dbg_number); + + list_del(&lb->link); + kfree(lb); + } + + ps3_vuart_disable_interrupt_tx(dev); +port_full: + spin_unlock_irqrestore(&priv->tx_list.lock, flags); + dev_dbg(&dev->core, "%s:%d wrote %lxh bytes total\n", + __func__, __LINE__, bytes_total); + return result; +} + +/** + * ps3_vuart_handle_interrupt_rx - third stage receive interrupt handler + * + * Services the receive interrupt for the port. Creates a list buffer and + * copies all waiting port data to that buffer and enqueues the buffer in the + * buffer list. Buffer list data is dequeued via ps3_vuart_read. + */ + +static int ps3_vuart_handle_interrupt_rx(struct ps3_system_bus_device *dev) +{ + int result; + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + unsigned long flags; + u64 bytes; + + dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); + + spin_lock_irqsave(&priv->rx_list.lock, flags); + result = ps3_vuart_queue_rx_bytes(dev, &bytes); + + if (result) { + spin_unlock_irqrestore(&priv->rx_list.lock, flags); + return result; + } + + if (priv->rx_list.work.trigger && priv->rx_list.bytes_held + >= priv->rx_list.work.trigger) { + dev_dbg(&dev->core, "%s:%d: schedule_work %lxh bytes\n", + __func__, __LINE__, priv->rx_list.work.trigger); + priv->rx_list.work.trigger = 0; + schedule_work(&priv->rx_list.work.work); + } + + spin_unlock_irqrestore(&priv->rx_list.lock, flags); + return result; +} + +static int ps3_vuart_handle_interrupt_disconnect( + struct ps3_system_bus_device *dev) +{ + dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); + BUG_ON("no support"); + return -1; +} + +/** + * ps3_vuart_handle_port_interrupt - second stage interrupt handler + * + * Services any pending interrupt types for the port. Passes control to the + * third stage type specific interrupt handler. Returns control to the first + * stage handler after one iteration. + */ + +static int ps3_vuart_handle_port_interrupt(struct ps3_system_bus_device *dev) +{ + int result; + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + unsigned long status; + + result = ps3_vuart_get_interrupt_status(dev, &status); + + if (result) + return result; + + dev_dbg(&dev->core, "%s:%d: status: %lxh\n", __func__, __LINE__, + status); + + if (status & INTERRUPT_MASK_DISCONNECT) { + priv->stats.disconnect_interrupts++; + result = ps3_vuart_handle_interrupt_disconnect(dev); + if (result) + ps3_vuart_disable_interrupt_disconnect(dev); + } + + if (status & INTERRUPT_MASK_TX) { + priv->stats.tx_interrupts++; + result = ps3_vuart_handle_interrupt_tx(dev); + if (result) + ps3_vuart_disable_interrupt_tx(dev); + } + + if (status & INTERRUPT_MASK_RX) { + priv->stats.rx_interrupts++; + result = ps3_vuart_handle_interrupt_rx(dev); + if (result) + ps3_vuart_disable_interrupt_rx(dev); + } + + return 0; +} + +struct vuart_bus_priv { + struct ports_bmp *bmp; + unsigned int virq; + struct semaphore probe_mutex; + int use_count; + struct ps3_system_bus_device *devices[PORT_COUNT]; +} static vuart_bus_priv; + +/** + * ps3_vuart_irq_handler - first stage interrupt handler + * + * Loops finding any interrupting port and its associated instance data. + * Passes control to the second stage port specific interrupt handler. Loops + * until all outstanding interrupts are serviced. + */ + +static irqreturn_t ps3_vuart_irq_handler(int irq, void *_private) +{ + struct vuart_bus_priv *bus_priv = _private; + + BUG_ON(!bus_priv); + + while (1) { + unsigned int port; + + dump_ports_bmp(bus_priv->bmp); + + port = (BITS_PER_LONG - 1) - __ilog2(bus_priv->bmp->status); + + if (port == BITS_PER_LONG) + break; + + BUG_ON(port >= PORT_COUNT); + BUG_ON(!bus_priv->devices[port]); + + ps3_vuart_handle_port_interrupt(bus_priv->devices[port]); + } + + return IRQ_HANDLED; +} + +static int ps3_vuart_bus_interrupt_get(void) +{ + int result; + + pr_debug(" -> %s:%d\n", __func__, __LINE__); + + vuart_bus_priv.use_count++; + + BUG_ON(vuart_bus_priv.use_count > 2); + + if (vuart_bus_priv.use_count != 1) { + return 0; + } + + BUG_ON(vuart_bus_priv.bmp); + + vuart_bus_priv.bmp = kzalloc(sizeof(struct ports_bmp), GFP_KERNEL); + + if (!vuart_bus_priv.bmp) { + pr_debug("%s:%d: kzalloc failed.\n", __func__, __LINE__); + result = -ENOMEM; + goto fail_bmp_malloc; + } + + result = ps3_vuart_irq_setup(PS3_BINDING_CPU_ANY, vuart_bus_priv.bmp, + &vuart_bus_priv.virq); + + if (result) { + pr_debug("%s:%d: ps3_vuart_irq_setup failed (%d)\n", + __func__, __LINE__, result); + result = -EPERM; + goto fail_alloc_irq; + } + + result = request_irq(vuart_bus_priv.virq, ps3_vuart_irq_handler, + IRQF_DISABLED, "vuart", &vuart_bus_priv); + + if (result) { + pr_debug("%s:%d: request_irq failed (%d)\n", + __func__, __LINE__, result); + goto fail_request_irq; + } + + pr_debug(" <- %s:%d: ok\n", __func__, __LINE__); + return result; + +fail_request_irq: + ps3_vuart_irq_destroy(vuart_bus_priv.virq); + vuart_bus_priv.virq = NO_IRQ; +fail_alloc_irq: + kfree(vuart_bus_priv.bmp); + vuart_bus_priv.bmp = NULL; +fail_bmp_malloc: + vuart_bus_priv.use_count--; + pr_debug(" <- %s:%d: failed\n", __func__, __LINE__); + return result; +} + +static int ps3_vuart_bus_interrupt_put(void) +{ + pr_debug(" -> %s:%d\n", __func__, __LINE__); + + vuart_bus_priv.use_count--; + + BUG_ON(vuart_bus_priv.use_count < 0); + + if (vuart_bus_priv.use_count != 0) + return 0; + + free_irq(vuart_bus_priv.virq, &vuart_bus_priv); + + ps3_vuart_irq_destroy(vuart_bus_priv.virq); + vuart_bus_priv.virq = NO_IRQ; + + kfree(vuart_bus_priv.bmp); + vuart_bus_priv.bmp = NULL; + + pr_debug(" <- %s:%d\n", __func__, __LINE__); + return 0; +} + +static int ps3_vuart_probe(struct ps3_system_bus_device *dev) +{ + int result; + struct ps3_vuart_port_driver *drv; + struct ps3_vuart_port_priv *priv = NULL; + + dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); + + drv = ps3_system_bus_dev_to_vuart_drv(dev); + + dev_dbg(&dev->core, "%s:%d: (%s)\n", __func__, __LINE__, + drv->core.core.name); + + BUG_ON(!drv); + + if (dev->port_number >= PORT_COUNT) { + BUG(); + return -EINVAL; + } + + down(&vuart_bus_priv.probe_mutex); + + result = ps3_vuart_bus_interrupt_get(); + + if (result) + goto fail_setup_interrupt; + + if (vuart_bus_priv.devices[dev->port_number]) { + dev_dbg(&dev->core, "%s:%d: port busy (%d)\n", __func__, + __LINE__, dev->port_number); + result = -EBUSY; + goto fail_busy; + } + + vuart_bus_priv.devices[dev->port_number] = dev; + + /* Setup dev->driver_priv. */ + + dev->driver_priv = kzalloc(sizeof(struct ps3_vuart_port_priv), + GFP_KERNEL); + + if (!dev->driver_priv) { + result = -ENOMEM; + goto fail_dev_malloc; + } + + priv = to_port_priv(dev); + + INIT_LIST_HEAD(&priv->tx_list.head); + spin_lock_init(&priv->tx_list.lock); + + INIT_LIST_HEAD(&priv->rx_list.head); + spin_lock_init(&priv->rx_list.lock); + + INIT_WORK(&priv->rx_list.work.work, NULL); + priv->rx_list.work.trigger = 0; + priv->rx_list.work.dev = dev; + + /* clear stale pending interrupts */ + + ps3_vuart_clear_rx_bytes(dev, 0); + + ps3_vuart_set_interrupt_mask(dev, INTERRUPT_MASK_RX); + + ps3_vuart_set_triggers(dev, 1, 1); + + if (drv->probe) + result = drv->probe(dev); + else { + result = 0; + dev_info(&dev->core, "%s:%d: no probe method\n", __func__, + __LINE__); + } + + if (result) { + dev_dbg(&dev->core, "%s:%d: drv->probe failed\n", + __func__, __LINE__); + down(&vuart_bus_priv.probe_mutex); + goto fail_probe; + } + + up(&vuart_bus_priv.probe_mutex); + + return result; + +fail_probe: + ps3_vuart_set_interrupt_mask(dev, 0); + kfree(dev->driver_priv); + dev->driver_priv = NULL; +fail_dev_malloc: + vuart_bus_priv.devices[dev->port_number] = NULL; +fail_busy: + ps3_vuart_bus_interrupt_put(); +fail_setup_interrupt: + up(&vuart_bus_priv.probe_mutex); + dev_dbg(&dev->core, "%s:%d: failed\n", __func__, __LINE__); + return result; +} + +/** + * ps3_vuart_cleanup - common cleanup helper. + * @dev: The struct ps3_system_bus_device instance. + * + * Cleans interrupts and HV resources. Must be called with + * vuart_bus_priv.probe_mutex held. Used by ps3_vuart_remove and + * ps3_vuart_shutdown. After this call, polled reading will still work. + */ + +static int ps3_vuart_cleanup(struct ps3_system_bus_device *dev) +{ + dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); + + ps3_vuart_cancel_async(dev); + ps3_vuart_set_interrupt_mask(dev, 0); + ps3_vuart_bus_interrupt_put(); + return 0; +} + +/** + * ps3_vuart_remove - Completely clean the device instance. + * @dev: The struct ps3_system_bus_device instance. + * + * Cleans all memory, interrupts and HV resources. After this call the + * device can no longer be used. + */ + +static int ps3_vuart_remove(struct ps3_system_bus_device *dev) +{ + struct ps3_vuart_port_priv *priv = to_port_priv(dev); + struct ps3_vuart_port_driver *drv; + + BUG_ON(!dev); + + down(&vuart_bus_priv.probe_mutex); + + dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__, + dev->match_id); + + if (!dev->core.driver) { + dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__, + __LINE__); + up(&vuart_bus_priv.probe_mutex); + return 0; + } + + drv = ps3_system_bus_dev_to_vuart_drv(dev); + + BUG_ON(!drv); + + if (drv->remove) { + drv->remove(dev); + } else { + dev_dbg(&dev->core, "%s:%d: no remove method\n", __func__, + __LINE__); + BUG(); + } + + ps3_vuart_cleanup(dev); + + vuart_bus_priv.devices[dev->port_number] = NULL; + kfree(priv); + priv = NULL; + + dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__); + up(&vuart_bus_priv.probe_mutex); + return 0; +} + +/** + * ps3_vuart_shutdown - Cleans interrupts and HV resources. + * @dev: The struct ps3_system_bus_device instance. + * + * Cleans interrupts and HV resources. After this call the + * device can still be used in polling mode. This behavior required + * by sys-manager to be able to complete the device power operation + * sequence. + */ + +static int ps3_vuart_shutdown(struct ps3_system_bus_device *dev) +{ + struct ps3_vuart_port_driver *drv; + + BUG_ON(!dev); + + down(&vuart_bus_priv.probe_mutex); + + dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__, + dev->match_id); + + if (!dev->core.driver) { + dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__, + __LINE__); + up(&vuart_bus_priv.probe_mutex); + return 0; + } + + drv = ps3_system_bus_dev_to_vuart_drv(dev); + + BUG_ON(!drv); + + if (drv->shutdown) + drv->shutdown(dev); + else if (drv->remove) { + dev_dbg(&dev->core, "%s:%d: no shutdown, calling remove\n", + __func__, __LINE__); + drv->remove(dev); + } else { + dev_dbg(&dev->core, "%s:%d: no shutdown method\n", __func__, + __LINE__); + BUG(); + } + + ps3_vuart_cleanup(dev); + + dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__); + + up(&vuart_bus_priv.probe_mutex); + return 0; +} + +static int __init ps3_vuart_bus_init(void) +{ + pr_debug("%s:%d:\n", __func__, __LINE__); + + if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) + return -ENODEV; + + init_MUTEX(&vuart_bus_priv.probe_mutex); + + return 0; +} + +static void __exit ps3_vuart_bus_exit(void) +{ + pr_debug("%s:%d:\n", __func__, __LINE__); +} + +core_initcall(ps3_vuart_bus_init); +module_exit(ps3_vuart_bus_exit); + +/** + * ps3_vuart_port_driver_register - Add a vuart port device driver. + */ + +int ps3_vuart_port_driver_register(struct ps3_vuart_port_driver *drv) +{ + int result; + + pr_debug("%s:%d: (%s)\n", __func__, __LINE__, drv->core.core.name); + + BUG_ON(!drv->core.match_id); + BUG_ON(!drv->core.core.name); + + drv->core.probe = ps3_vuart_probe; + drv->core.remove = ps3_vuart_remove; + drv->core.shutdown = ps3_vuart_shutdown; + + result = ps3_system_bus_driver_register(&drv->core); + return result; +} +EXPORT_SYMBOL_GPL(ps3_vuart_port_driver_register); + +/** + * ps3_vuart_port_driver_unregister - Remove a vuart port device driver. + */ + +void ps3_vuart_port_driver_unregister(struct ps3_vuart_port_driver *drv) +{ + pr_debug("%s:%d: (%s)\n", __func__, __LINE__, drv->core.core.name); + ps3_system_bus_driver_unregister(&drv->core); +} +EXPORT_SYMBOL_GPL(ps3_vuart_port_driver_unregister); diff --git a/drivers/ps3/sys-manager.c b/drivers/ps3/sys-manager.c deleted file mode 100644 index 8461b08ab9fb..000000000000 --- a/drivers/ps3/sys-manager.c +++ /dev/null @@ -1,702 +0,0 @@ -/* - * PS3 System Manager. - * - * Copyright (C) 2007 Sony Computer Entertainment Inc. - * Copyright 2007 Sony Corp. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include -#include -#include -#include - -#include -#include - -#include "vuart.h" - -MODULE_AUTHOR("Sony Corporation"); -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("PS3 System Manager"); - -/** - * ps3_sys_manager - PS3 system manager driver. - * - * The system manager provides an asynchronous system event notification - * mechanism for reporting events like thermal alert and button presses to - * guests. It also provides support to control system shutdown and startup. - * - * The actual system manager is implemented as an application running in the - * system policy module in lpar_1. Guests communicate with the system manager - * through port 2 of the vuart using a simple packet message protocol. - * Messages are comprised of a fixed field header followed by a message - * specific payload. - */ - -/** - * struct ps3_sys_manager_header - System manager message header. - * @version: Header version, currently 1. - * @size: Header size in bytes, curently 16. - * @payload_size: Message payload size in bytes. - * @service_id: Message type, one of enum ps3_sys_manager_service_id. - * @request_tag: Unique number to identify reply. - */ - -struct ps3_sys_manager_header { - /* version 1 */ - u8 version; - u8 size; - u16 reserved_1; - u32 payload_size; - u16 service_id; - u16 reserved_2; - u32 request_tag; -}; - -#define dump_sm_header(_h) _dump_sm_header(_h, __func__, __LINE__) -static void __maybe_unused _dump_sm_header( - const struct ps3_sys_manager_header *h, const char *func, int line) -{ - pr_debug("%s:%d: version: %xh\n", func, line, h->version); - pr_debug("%s:%d: size: %xh\n", func, line, h->size); - pr_debug("%s:%d: payload_size: %xh\n", func, line, h->payload_size); - pr_debug("%s:%d: service_id: %xh\n", func, line, h->service_id); - pr_debug("%s:%d: request_tag: %xh\n", func, line, h->request_tag); -} - -/** - * @PS3_SM_RX_MSG_LEN_MIN - Shortest received message length. - * @PS3_SM_RX_MSG_LEN_MAX - Longest received message length. - * - * Currently all messages received from the system manager are either - * (16 bytes header + 8 bytes payload = 24 bytes) or (16 bytes header - * + 16 bytes payload = 32 bytes). This knowlege is used to simplify - * the logic. - */ - -enum { - PS3_SM_RX_MSG_LEN_MIN = 24, - PS3_SM_RX_MSG_LEN_MAX = 32, -}; - -/** - * enum ps3_sys_manager_service_id - Message header service_id. - * @PS3_SM_SERVICE_ID_REQUEST: guest --> sys_manager. - * @PS3_SM_SERVICE_ID_REQUEST_ERROR: guest <-- sys_manager. - * @PS3_SM_SERVICE_ID_COMMAND: guest <-- sys_manager. - * @PS3_SM_SERVICE_ID_RESPONSE: guest --> sys_manager. - * @PS3_SM_SERVICE_ID_SET_ATTR: guest --> sys_manager. - * @PS3_SM_SERVICE_ID_EXTERN_EVENT: guest <-- sys_manager. - * @PS3_SM_SERVICE_ID_SET_NEXT_OP: guest --> sys_manager. - * - * PS3_SM_SERVICE_ID_REQUEST_ERROR is returned for invalid data values in a - * a PS3_SM_SERVICE_ID_REQUEST message. It also seems to be returned when - * a REQUEST message is sent at the wrong time. - */ - -enum ps3_sys_manager_service_id { - /* version 1 */ - PS3_SM_SERVICE_ID_REQUEST = 1, - PS3_SM_SERVICE_ID_RESPONSE = 2, - PS3_SM_SERVICE_ID_COMMAND = 3, - PS3_SM_SERVICE_ID_EXTERN_EVENT = 4, - PS3_SM_SERVICE_ID_SET_NEXT_OP = 5, - PS3_SM_SERVICE_ID_REQUEST_ERROR = 6, - PS3_SM_SERVICE_ID_SET_ATTR = 8, -}; - -/** - * enum ps3_sys_manager_attr - Notification attribute (bit position mask). - * @PS3_SM_ATTR_POWER: Power button. - * @PS3_SM_ATTR_RESET: Reset button, not available on retail console. - * @PS3_SM_ATTR_THERMAL: Sytem thermal alert. - * @PS3_SM_ATTR_CONTROLLER: Remote controller event. - * @PS3_SM_ATTR_ALL: Logical OR of all. - * - * The guest tells the system manager which events it is interested in receiving - * notice of by sending the system manager a logical OR of notification - * attributes via the ps3_sys_manager_send_attr() routine. - */ - -enum ps3_sys_manager_attr { - /* version 1 */ - PS3_SM_ATTR_POWER = 1, - PS3_SM_ATTR_RESET = 2, - PS3_SM_ATTR_THERMAL = 4, - PS3_SM_ATTR_CONTROLLER = 8, /* bogus? */ - PS3_SM_ATTR_ALL = 0x0f, -}; - -/** - * enum ps3_sys_manager_event - External event type, reported by system manager. - * @PS3_SM_EVENT_POWER_PRESSED: payload.value not used. - * @PS3_SM_EVENT_POWER_RELEASED: payload.value = time pressed in millisec. - * @PS3_SM_EVENT_RESET_PRESSED: payload.value not used. - * @PS3_SM_EVENT_RESET_RELEASED: payload.value = time pressed in millisec. - * @PS3_SM_EVENT_THERMAL_ALERT: payload.value = thermal zone id. - * @PS3_SM_EVENT_THERMAL_CLEARED: payload.value = thermal zone id. - */ - -enum ps3_sys_manager_event { - /* version 1 */ - PS3_SM_EVENT_POWER_PRESSED = 3, - PS3_SM_EVENT_POWER_RELEASED = 4, - PS3_SM_EVENT_RESET_PRESSED = 5, - PS3_SM_EVENT_RESET_RELEASED = 6, - PS3_SM_EVENT_THERMAL_ALERT = 7, - PS3_SM_EVENT_THERMAL_CLEARED = 8, - /* no info on controller events */ -}; - -/** - * enum ps3_sys_manager_next_op - Operation to perform after lpar is destroyed. - */ - -enum ps3_sys_manager_next_op { - /* version 3 */ - PS3_SM_NEXT_OP_SYS_SHUTDOWN = 1, - PS3_SM_NEXT_OP_SYS_REBOOT = 2, - PS3_SM_NEXT_OP_LPAR_REBOOT = 0x82, -}; - -/** - * enum ps3_sys_manager_wake_source - Next-op wakeup source (bit position mask). - * @PS3_SM_WAKE_DEFAULT: Disk insert, power button, eject button, IR - * controller, and bluetooth controller. - * @PS3_SM_WAKE_RTC: - * @PS3_SM_WAKE_RTC_ERROR: - * @PS3_SM_WAKE_P_O_R: Power on reset. - * - * Additional wakeup sources when specifying PS3_SM_NEXT_OP_SYS_SHUTDOWN. - * System will always wake from the PS3_SM_WAKE_DEFAULT sources. - */ - -enum ps3_sys_manager_wake_source { - /* version 3 */ - PS3_SM_WAKE_DEFAULT = 0, - PS3_SM_WAKE_RTC = 0x00000040, - PS3_SM_WAKE_RTC_ERROR = 0x00000080, - PS3_SM_WAKE_P_O_R = 0x10000000, -}; - -/** - * enum ps3_sys_manager_cmd - Command from system manager to guest. - * - * The guest completes the actions needed, then acks or naks the command via - * ps3_sys_manager_send_response(). In the case of @PS3_SM_CMD_SHUTDOWN, - * the guest must be fully prepared for a system poweroff prior to acking the - * command. - */ - -enum ps3_sys_manager_cmd { - /* version 1 */ - PS3_SM_CMD_SHUTDOWN = 1, /* shutdown guest OS */ -}; - -/** - * ps3_sm_force_power_off - Poweroff helper. - * - * A global variable used to force a poweroff when the power button has - * been pressed irrespective of how init handles the ctrl_alt_del signal. - * - */ - -static unsigned int ps3_sm_force_power_off; - -/** - * ps3_sys_manager_write - Helper to write a two part message to the vuart. - * - */ - -static int ps3_sys_manager_write(struct ps3_system_bus_device *dev, - const struct ps3_sys_manager_header *header, const void *payload) -{ - int result; - - BUG_ON(header->version != 1); - BUG_ON(header->size != 16); - BUG_ON(header->payload_size != 8 && header->payload_size != 16); - BUG_ON(header->service_id > 8); - - result = ps3_vuart_write(dev, header, - sizeof(struct ps3_sys_manager_header)); - - if (!result) - result = ps3_vuart_write(dev, payload, header->payload_size); - - return result; -} - -/** - * ps3_sys_manager_send_attr - Send a 'set attribute' to the system manager. - * - */ - -static int ps3_sys_manager_send_attr(struct ps3_system_bus_device *dev, - enum ps3_sys_manager_attr attr) -{ - struct ps3_sys_manager_header header; - struct { - u8 version; - u8 reserved_1[3]; - u32 attribute; - } payload; - - BUILD_BUG_ON(sizeof(payload) != 8); - - dev_dbg(&dev->core, "%s:%d: %xh\n", __func__, __LINE__, attr); - - memset(&header, 0, sizeof(header)); - header.version = 1; - header.size = 16; - header.payload_size = 16; - header.service_id = PS3_SM_SERVICE_ID_SET_ATTR; - - memset(&payload, 0, sizeof(payload)); - payload.version = 1; - payload.attribute = attr; - - return ps3_sys_manager_write(dev, &header, &payload); -} - -/** - * ps3_sys_manager_send_next_op - Send a 'set next op' to the system manager. - * - * Tell the system manager what to do after this lpar is destroyed. - */ - -static int ps3_sys_manager_send_next_op(struct ps3_system_bus_device *dev, - enum ps3_sys_manager_next_op op, - enum ps3_sys_manager_wake_source wake_source) -{ - struct ps3_sys_manager_header header; - struct { - u8 version; - u8 type; - u8 gos_id; - u8 reserved_1; - u32 wake_source; - u8 reserved_2[8]; - } payload; - - BUILD_BUG_ON(sizeof(payload) != 16); - - dev_dbg(&dev->core, "%s:%d: (%xh)\n", __func__, __LINE__, op); - - memset(&header, 0, sizeof(header)); - header.version = 1; - header.size = 16; - header.payload_size = 16; - header.service_id = PS3_SM_SERVICE_ID_SET_NEXT_OP; - - memset(&payload, 0, sizeof(payload)); - payload.version = 3; - payload.type = op; - payload.gos_id = 3; /* other os */ - payload.wake_source = wake_source; - - return ps3_sys_manager_write(dev, &header, &payload); -} - -/** - * ps3_sys_manager_send_request_shutdown - Send 'request' to the system manager. - * - * The guest sends this message to request an operation or action of the system - * manager. The reply is a command message from the system manager. In the - * command handler the guest performs the requested operation. The result of - * the command is then communicated back to the system manager with a response - * message. - * - * Currently, the only supported request is the 'shutdown self' request. - */ - -static int ps3_sys_manager_send_request_shutdown( - struct ps3_system_bus_device *dev) -{ - struct ps3_sys_manager_header header; - struct { - u8 version; - u8 type; - u8 gos_id; - u8 reserved_1[13]; - } payload; - - BUILD_BUG_ON(sizeof(payload) != 16); - - dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); - - memset(&header, 0, sizeof(header)); - header.version = 1; - header.size = 16; - header.payload_size = 16; - header.service_id = PS3_SM_SERVICE_ID_REQUEST; - - memset(&payload, 0, sizeof(payload)); - payload.version = 1; - payload.type = 1; /* shutdown */ - payload.gos_id = 0; /* self */ - - return ps3_sys_manager_write(dev, &header, &payload); -} - -/** - * ps3_sys_manager_send_response - Send a 'response' to the system manager. - * @status: zero = success, others fail. - * - * The guest sends this message to the system manager to acnowledge success or - * failure of a command sent by the system manager. - */ - -static int ps3_sys_manager_send_response(struct ps3_system_bus_device *dev, - u64 status) -{ - struct ps3_sys_manager_header header; - struct { - u8 version; - u8 reserved_1[3]; - u8 status; - u8 reserved_2[11]; - } payload; - - BUILD_BUG_ON(sizeof(payload) != 16); - - dev_dbg(&dev->core, "%s:%d: (%s)\n", __func__, __LINE__, - (status ? "nak" : "ack")); - - memset(&header, 0, sizeof(header)); - header.version = 1; - header.size = 16; - header.payload_size = 16; - header.service_id = PS3_SM_SERVICE_ID_RESPONSE; - - memset(&payload, 0, sizeof(payload)); - payload.version = 1; - payload.status = status; - - return ps3_sys_manager_write(dev, &header, &payload); -} - -/** - * ps3_sys_manager_handle_event - Second stage event msg handler. - * - */ - -static int ps3_sys_manager_handle_event(struct ps3_system_bus_device *dev) -{ - int result; - struct { - u8 version; - u8 type; - u8 reserved_1[2]; - u32 value; - u8 reserved_2[8]; - } event; - - BUILD_BUG_ON(sizeof(event) != 16); - - result = ps3_vuart_read(dev, &event, sizeof(event)); - BUG_ON(result && "need to retry here"); - - if (event.version != 1) { - dev_dbg(&dev->core, "%s:%d: unsupported event version (%u)\n", - __func__, __LINE__, event.version); - return -EIO; - } - - switch (event.type) { - case PS3_SM_EVENT_POWER_PRESSED: - dev_dbg(&dev->core, "%s:%d: POWER_PRESSED\n", - __func__, __LINE__); - ps3_sm_force_power_off = 1; - /* - * A memory barrier is use here to sync memory since - * ps3_sys_manager_final_restart() could be called on - * another cpu. - */ - wmb(); - kill_cad_pid(SIGINT, 1); /* ctrl_alt_del */ - break; - case PS3_SM_EVENT_POWER_RELEASED: - dev_dbg(&dev->core, "%s:%d: POWER_RELEASED (%u ms)\n", - __func__, __LINE__, event.value); - break; - case PS3_SM_EVENT_RESET_PRESSED: - dev_dbg(&dev->core, "%s:%d: RESET_PRESSED\n", - __func__, __LINE__); - ps3_sm_force_power_off = 0; - /* - * A memory barrier is use here to sync memory since - * ps3_sys_manager_final_restart() could be called on - * another cpu. - */ - wmb(); - kill_cad_pid(SIGINT, 1); /* ctrl_alt_del */ - break; - case PS3_SM_EVENT_RESET_RELEASED: - dev_dbg(&dev->core, "%s:%d: RESET_RELEASED (%u ms)\n", - __func__, __LINE__, event.value); - break; - case PS3_SM_EVENT_THERMAL_ALERT: - dev_dbg(&dev->core, "%s:%d: THERMAL_ALERT (zone %u)\n", - __func__, __LINE__, event.value); - printk(KERN_INFO "PS3 Thermal Alert Zone %u\n", event.value); - break; - case PS3_SM_EVENT_THERMAL_CLEARED: - dev_dbg(&dev->core, "%s:%d: THERMAL_CLEARED (zone %u)\n", - __func__, __LINE__, event.value); - break; - default: - dev_dbg(&dev->core, "%s:%d: unknown event (%u)\n", - __func__, __LINE__, event.type); - return -EIO; - } - - return 0; -} -/** - * ps3_sys_manager_handle_cmd - Second stage command msg handler. - * - * The system manager sends this in reply to a 'request' message from the guest. - */ - -static int ps3_sys_manager_handle_cmd(struct ps3_system_bus_device *dev) -{ - int result; - struct { - u8 version; - u8 type; - u8 reserved_1[14]; - } cmd; - - BUILD_BUG_ON(sizeof(cmd) != 16); - - dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); - - result = ps3_vuart_read(dev, &cmd, sizeof(cmd)); - BUG_ON(result && "need to retry here"); - - if(result) - return result; - - if (cmd.version != 1) { - dev_dbg(&dev->core, "%s:%d: unsupported cmd version (%u)\n", - __func__, __LINE__, cmd.version); - return -EIO; - } - - if (cmd.type != PS3_SM_CMD_SHUTDOWN) { - dev_dbg(&dev->core, "%s:%d: unknown cmd (%u)\n", - __func__, __LINE__, cmd.type); - return -EIO; - } - - ps3_sys_manager_send_response(dev, 0); - return 0; -} - -/** - * ps3_sys_manager_handle_msg - First stage msg handler. - * - * Can be called directly to manually poll vuart and pump message handler. - */ - -static int ps3_sys_manager_handle_msg(struct ps3_system_bus_device *dev) -{ - int result; - struct ps3_sys_manager_header header; - - result = ps3_vuart_read(dev, &header, - sizeof(struct ps3_sys_manager_header)); - - if(result) - return result; - - if (header.version != 1) { - dev_dbg(&dev->core, "%s:%d: unsupported header version (%u)\n", - __func__, __LINE__, header.version); - dump_sm_header(&header); - goto fail_header; - } - - BUILD_BUG_ON(sizeof(header) != 16); - - if (header.size != 16 || (header.payload_size != 8 - && header.payload_size != 16)) { - dump_sm_header(&header); - BUG(); - } - - switch (header.service_id) { - case PS3_SM_SERVICE_ID_EXTERN_EVENT: - dev_dbg(&dev->core, "%s:%d: EVENT\n", __func__, __LINE__); - return ps3_sys_manager_handle_event(dev); - case PS3_SM_SERVICE_ID_COMMAND: - dev_dbg(&dev->core, "%s:%d: COMMAND\n", __func__, __LINE__); - return ps3_sys_manager_handle_cmd(dev); - case PS3_SM_SERVICE_ID_REQUEST_ERROR: - dev_dbg(&dev->core, "%s:%d: REQUEST_ERROR\n", __func__, - __LINE__); - dump_sm_header(&header); - break; - default: - dev_dbg(&dev->core, "%s:%d: unknown service_id (%u)\n", - __func__, __LINE__, header.service_id); - break; - } - goto fail_id; - -fail_header: - ps3_vuart_clear_rx_bytes(dev, 0); - return -EIO; -fail_id: - ps3_vuart_clear_rx_bytes(dev, header.payload_size); - return -EIO; -} - -/** - * ps3_sys_manager_final_power_off - The final platform machine_power_off routine. - * - * This routine never returns. The routine disables asynchronous vuart reads - * then spins calling ps3_sys_manager_handle_msg() to receive and acknowledge - * the shutdown command sent from the system manager. Soon after the - * acknowledgement is sent the lpar is destroyed by the HV. This routine - * should only be called from ps3_power_off() through - * ps3_sys_manager_ops.power_off. - */ - -static void ps3_sys_manager_final_power_off(struct ps3_system_bus_device *dev) -{ - BUG_ON(!dev); - - dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); - - ps3_vuart_cancel_async(dev); - - ps3_sys_manager_send_next_op(dev, PS3_SM_NEXT_OP_SYS_SHUTDOWN, - PS3_SM_WAKE_DEFAULT); - ps3_sys_manager_send_request_shutdown(dev); - - printk(KERN_EMERG "System Halted, OK to turn off power\n"); - - while(1) - ps3_sys_manager_handle_msg(dev); -} - -/** - * ps3_sys_manager_final_restart - The final platform machine_restart routine. - * - * This routine never returns. The routine disables asynchronous vuart reads - * then spins calling ps3_sys_manager_handle_msg() to receive and acknowledge - * the shutdown command sent from the system manager. Soon after the - * acknowledgement is sent the lpar is destroyed by the HV. This routine - * should only be called from ps3_restart() through ps3_sys_manager_ops.restart. - */ - -static void ps3_sys_manager_final_restart(struct ps3_system_bus_device *dev) -{ - BUG_ON(!dev); - - dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); - - /* Check if we got here via a power button event. */ - - if (ps3_sm_force_power_off) { - dev_dbg(&dev->core, "%s:%d: forcing poweroff\n", - __func__, __LINE__); - ps3_sys_manager_final_power_off(dev); - } - - ps3_vuart_cancel_async(dev); - - ps3_sys_manager_send_attr(dev, 0); - ps3_sys_manager_send_next_op(dev, PS3_SM_NEXT_OP_LPAR_REBOOT, - PS3_SM_WAKE_DEFAULT); - ps3_sys_manager_send_request_shutdown(dev); - - printk(KERN_EMERG "System Halted, OK to turn off power\n"); - - while(1) - ps3_sys_manager_handle_msg(dev); -} - -/** - * ps3_sys_manager_work - Asynchronous read handler. - * - * Signaled when PS3_SM_RX_MSG_LEN_MIN bytes arrive at the vuart port. - */ - -static void ps3_sys_manager_work(struct ps3_system_bus_device *dev) -{ - ps3_sys_manager_handle_msg(dev); - ps3_vuart_read_async(dev, PS3_SM_RX_MSG_LEN_MIN); -} - -static int ps3_sys_manager_probe(struct ps3_system_bus_device *dev) -{ - int result; - struct ps3_sys_manager_ops ops; - - dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); - - ops.power_off = ps3_sys_manager_final_power_off; - ops.restart = ps3_sys_manager_final_restart; - ops.dev = dev; - - /* ps3_sys_manager_register_ops copies ops. */ - - ps3_sys_manager_register_ops(&ops); - - result = ps3_sys_manager_send_attr(dev, PS3_SM_ATTR_ALL); - BUG_ON(result); - - result = ps3_vuart_read_async(dev, PS3_SM_RX_MSG_LEN_MIN); - BUG_ON(result); - - return result; -} - -static int ps3_sys_manager_remove(struct ps3_system_bus_device *dev) -{ - dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); - return 0; -} - -static void ps3_sys_manager_shutdown(struct ps3_system_bus_device *dev) -{ - dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); -} - -static struct ps3_vuart_port_driver ps3_sys_manager = { - .core.match_id = PS3_MATCH_ID_SYSTEM_MANAGER, - .core.core.name = "ps3_sys_manager", - .probe = ps3_sys_manager_probe, - .remove = ps3_sys_manager_remove, - .shutdown = ps3_sys_manager_shutdown, - .work = ps3_sys_manager_work, -}; - -static int __init ps3_sys_manager_init(void) -{ - if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) - return -ENODEV; - - return ps3_vuart_port_driver_register(&ps3_sys_manager); -} - -module_init(ps3_sys_manager_init); -/* Module remove not supported. */ - -MODULE_ALIAS(PS3_MODULE_ALIAS_SYSTEM_MANAGER); diff --git a/drivers/ps3/vuart.c b/drivers/ps3/vuart.c deleted file mode 100644 index 9dea585ef806..000000000000 --- a/drivers/ps3/vuart.c +++ /dev/null @@ -1,1271 +0,0 @@ -/* - * PS3 virtual uart - * - * Copyright (C) 2006 Sony Computer Entertainment Inc. - * Copyright 2006 Sony Corp. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include -#include -#include -#include -#include -#include - -#include -#include - -#include "vuart.h" - -MODULE_AUTHOR("Sony Corporation"); -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("PS3 vuart"); - -/** - * vuart - An inter-partition data link service. - * port 0: PS3 AV Settings. - * port 2: PS3 System Manager. - * - * The vuart provides a bi-directional byte stream data link between logical - * partitions. Its primary role is as a communications link between the guest - * OS and the system policy module. The current HV does not support any - * connections other than those listed. - */ - -enum {PORT_COUNT = 3,}; - -enum vuart_param { - PARAM_TX_TRIGGER = 0, - PARAM_RX_TRIGGER = 1, - PARAM_INTERRUPT_MASK = 2, - PARAM_RX_BUF_SIZE = 3, /* read only */ - PARAM_RX_BYTES = 4, /* read only */ - PARAM_TX_BUF_SIZE = 5, /* read only */ - PARAM_TX_BYTES = 6, /* read only */ - PARAM_INTERRUPT_STATUS = 7, /* read only */ -}; - -enum vuart_interrupt_bit { - INTERRUPT_BIT_TX = 0, - INTERRUPT_BIT_RX = 1, - INTERRUPT_BIT_DISCONNECT = 2, -}; - -enum vuart_interrupt_mask { - INTERRUPT_MASK_TX = 1, - INTERRUPT_MASK_RX = 2, - INTERRUPT_MASK_DISCONNECT = 4, -}; - -/** - * struct ps3_vuart_port_priv - private vuart device data. - */ - -struct ps3_vuart_port_priv { - u64 interrupt_mask; - - struct { - spinlock_t lock; - struct list_head head; - } tx_list; - struct { - struct ps3_vuart_work work; - unsigned long bytes_held; - spinlock_t lock; - struct list_head head; - } rx_list; - struct ps3_vuart_stats stats; -}; - -static struct ps3_vuart_port_priv *to_port_priv( - struct ps3_system_bus_device *dev) -{ - BUG_ON(!dev); - BUG_ON(!dev->driver_priv); - return (struct ps3_vuart_port_priv *)dev->driver_priv; -} - -/** - * struct ports_bmp - bitmap indicating ports needing service. - * - * A 256 bit read only bitmap indicating ports needing service. Do not write - * to these bits. Must not cross a page boundary. - */ - -struct ports_bmp { - u64 status; - u64 unused[3]; -} __attribute__ ((aligned (32))); - -#define dump_ports_bmp(_b) _dump_ports_bmp(_b, __func__, __LINE__) -static void __maybe_unused _dump_ports_bmp( - const struct ports_bmp* bmp, const char* func, int line) -{ - pr_debug("%s:%d: ports_bmp: %016lxh\n", func, line, bmp->status); -} - -#define dump_port_params(_b) _dump_port_params(_b, __func__, __LINE__) -static void __maybe_unused _dump_port_params(unsigned int port_number, - const char* func, int line) -{ -#if defined(DEBUG) - static const char *strings[] = { - "tx_trigger ", - "rx_trigger ", - "interrupt_mask ", - "rx_buf_size ", - "rx_bytes ", - "tx_buf_size ", - "tx_bytes ", - "interrupt_status", - }; - int result; - unsigned int i; - u64 value; - - for (i = 0; i < ARRAY_SIZE(strings); i++) { - result = lv1_get_virtual_uart_param(port_number, i, &value); - - if (result) { - pr_debug("%s:%d: port_%u: %s failed: %s\n", func, line, - port_number, strings[i], ps3_result(result)); - continue; - } - pr_debug("%s:%d: port_%u: %s = %lxh\n", - func, line, port_number, strings[i], value); - } -#endif -} - -struct vuart_triggers { - unsigned long rx; - unsigned long tx; -}; - -int ps3_vuart_get_triggers(struct ps3_system_bus_device *dev, - struct vuart_triggers *trig) -{ - int result; - unsigned long size; - unsigned long val; - - result = lv1_get_virtual_uart_param(dev->port_number, - PARAM_TX_TRIGGER, &trig->tx); - - if (result) { - dev_dbg(&dev->core, "%s:%d: tx_trigger failed: %s\n", - __func__, __LINE__, ps3_result(result)); - return result; - } - - result = lv1_get_virtual_uart_param(dev->port_number, - PARAM_RX_BUF_SIZE, &size); - - if (result) { - dev_dbg(&dev->core, "%s:%d: tx_buf_size failed: %s\n", - __func__, __LINE__, ps3_result(result)); - return result; - } - - result = lv1_get_virtual_uart_param(dev->port_number, - PARAM_RX_TRIGGER, &val); - - if (result) { - dev_dbg(&dev->core, "%s:%d: rx_trigger failed: %s\n", - __func__, __LINE__, ps3_result(result)); - return result; - } - - trig->rx = size - val; - - dev_dbg(&dev->core, "%s:%d: tx %lxh, rx %lxh\n", __func__, __LINE__, - trig->tx, trig->rx); - - return result; -} - -int ps3_vuart_set_triggers(struct ps3_system_bus_device *dev, unsigned int tx, - unsigned int rx) -{ - int result; - unsigned long size; - - result = lv1_set_virtual_uart_param(dev->port_number, - PARAM_TX_TRIGGER, tx); - - if (result) { - dev_dbg(&dev->core, "%s:%d: tx_trigger failed: %s\n", - __func__, __LINE__, ps3_result(result)); - return result; - } - - result = lv1_get_virtual_uart_param(dev->port_number, - PARAM_RX_BUF_SIZE, &size); - - if (result) { - dev_dbg(&dev->core, "%s:%d: tx_buf_size failed: %s\n", - __func__, __LINE__, ps3_result(result)); - return result; - } - - result = lv1_set_virtual_uart_param(dev->port_number, - PARAM_RX_TRIGGER, size - rx); - - if (result) { - dev_dbg(&dev->core, "%s:%d: rx_trigger failed: %s\n", - __func__, __LINE__, ps3_result(result)); - return result; - } - - dev_dbg(&dev->core, "%s:%d: tx %xh, rx %xh\n", __func__, __LINE__, - tx, rx); - - return result; -} - -static int ps3_vuart_get_rx_bytes_waiting(struct ps3_system_bus_device *dev, - u64 *bytes_waiting) -{ - int result; - - result = lv1_get_virtual_uart_param(dev->port_number, - PARAM_RX_BYTES, bytes_waiting); - - if (result) - dev_dbg(&dev->core, "%s:%d: rx_bytes failed: %s\n", - __func__, __LINE__, ps3_result(result)); - - dev_dbg(&dev->core, "%s:%d: %lxh\n", __func__, __LINE__, - *bytes_waiting); - return result; -} - -/** - * ps3_vuart_set_interrupt_mask - Enable/disable the port interrupt sources. - * @dev: The struct ps3_system_bus_device instance. - * @bmp: Logical OR of enum vuart_interrupt_mask values. A zero bit disables. - */ - -static int ps3_vuart_set_interrupt_mask(struct ps3_system_bus_device *dev, - unsigned long mask) -{ - int result; - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - - dev_dbg(&dev->core, "%s:%d: %lxh\n", __func__, __LINE__, mask); - - priv->interrupt_mask = mask; - - result = lv1_set_virtual_uart_param(dev->port_number, - PARAM_INTERRUPT_MASK, priv->interrupt_mask); - - if (result) - dev_dbg(&dev->core, "%s:%d: interrupt_mask failed: %s\n", - __func__, __LINE__, ps3_result(result)); - - return result; -} - -static int ps3_vuart_get_interrupt_status(struct ps3_system_bus_device *dev, - unsigned long *status) -{ - int result; - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - u64 tmp; - - result = lv1_get_virtual_uart_param(dev->port_number, - PARAM_INTERRUPT_STATUS, &tmp); - - if (result) - dev_dbg(&dev->core, "%s:%d: interrupt_status failed: %s\n", - __func__, __LINE__, ps3_result(result)); - - *status = tmp & priv->interrupt_mask; - - dev_dbg(&dev->core, "%s:%d: m %lxh, s %lxh, m&s %lxh\n", - __func__, __LINE__, priv->interrupt_mask, tmp, *status); - - return result; -} - -int ps3_vuart_enable_interrupt_tx(struct ps3_system_bus_device *dev) -{ - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - - return (priv->interrupt_mask & INTERRUPT_MASK_TX) ? 0 - : ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask - | INTERRUPT_MASK_TX); -} - -int ps3_vuart_enable_interrupt_rx(struct ps3_system_bus_device *dev) -{ - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - - return (priv->interrupt_mask & INTERRUPT_MASK_RX) ? 0 - : ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask - | INTERRUPT_MASK_RX); -} - -int ps3_vuart_enable_interrupt_disconnect(struct ps3_system_bus_device *dev) -{ - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - - return (priv->interrupt_mask & INTERRUPT_MASK_DISCONNECT) ? 0 - : ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask - | INTERRUPT_MASK_DISCONNECT); -} - -int ps3_vuart_disable_interrupt_tx(struct ps3_system_bus_device *dev) -{ - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - - return (priv->interrupt_mask & INTERRUPT_MASK_TX) - ? ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask - & ~INTERRUPT_MASK_TX) : 0; -} - -int ps3_vuart_disable_interrupt_rx(struct ps3_system_bus_device *dev) -{ - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - - return (priv->interrupt_mask & INTERRUPT_MASK_RX) - ? ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask - & ~INTERRUPT_MASK_RX) : 0; -} - -int ps3_vuart_disable_interrupt_disconnect(struct ps3_system_bus_device *dev) -{ - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - - return (priv->interrupt_mask & INTERRUPT_MASK_DISCONNECT) - ? ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask - & ~INTERRUPT_MASK_DISCONNECT) : 0; -} - -/** - * ps3_vuart_raw_write - Low level write helper. - * @dev: The struct ps3_system_bus_device instance. - * - * Do not call ps3_vuart_raw_write directly, use ps3_vuart_write. - */ - -static int ps3_vuart_raw_write(struct ps3_system_bus_device *dev, - const void* buf, unsigned int bytes, unsigned long *bytes_written) -{ - int result; - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - - result = lv1_write_virtual_uart(dev->port_number, - ps3_mm_phys_to_lpar(__pa(buf)), bytes, bytes_written); - - if (result) { - dev_dbg(&dev->core, "%s:%d: lv1_write_virtual_uart failed: " - "%s\n", __func__, __LINE__, ps3_result(result)); - return result; - } - - priv->stats.bytes_written += *bytes_written; - - dev_dbg(&dev->core, "%s:%d: wrote %lxh/%xh=>%lxh\n", __func__, __LINE__, - *bytes_written, bytes, priv->stats.bytes_written); - - return result; -} - -/** - * ps3_vuart_raw_read - Low level read helper. - * @dev: The struct ps3_system_bus_device instance. - * - * Do not call ps3_vuart_raw_read directly, use ps3_vuart_read. - */ - -static int ps3_vuart_raw_read(struct ps3_system_bus_device *dev, void *buf, - unsigned int bytes, unsigned long *bytes_read) -{ - int result; - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - - dev_dbg(&dev->core, "%s:%d: %xh\n", __func__, __LINE__, bytes); - - result = lv1_read_virtual_uart(dev->port_number, - ps3_mm_phys_to_lpar(__pa(buf)), bytes, bytes_read); - - if (result) { - dev_dbg(&dev->core, "%s:%d: lv1_read_virtual_uart failed: %s\n", - __func__, __LINE__, ps3_result(result)); - return result; - } - - priv->stats.bytes_read += *bytes_read; - - dev_dbg(&dev->core, "%s:%d: read %lxh/%xh=>%lxh\n", __func__, __LINE__, - *bytes_read, bytes, priv->stats.bytes_read); - - return result; -} - -/** - * ps3_vuart_clear_rx_bytes - Discard bytes received. - * @dev: The struct ps3_system_bus_device instance. - * @bytes: Max byte count to discard, zero = all pending. - * - * Used to clear pending rx interrupt source. Will not block. - */ - -void ps3_vuart_clear_rx_bytes(struct ps3_system_bus_device *dev, - unsigned int bytes) -{ - int result; - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - u64 bytes_waiting; - void* tmp; - - result = ps3_vuart_get_rx_bytes_waiting(dev, &bytes_waiting); - - BUG_ON(result); - - bytes = bytes ? min(bytes, (unsigned int)bytes_waiting) : bytes_waiting; - - dev_dbg(&dev->core, "%s:%d: %u\n", __func__, __LINE__, bytes); - - if (!bytes) - return; - - /* Add some extra space for recently arrived data. */ - - bytes += 128; - - tmp = kmalloc(bytes, GFP_KERNEL); - - if (!tmp) - return; - - ps3_vuart_raw_read(dev, tmp, bytes, &bytes_waiting); - - kfree(tmp); - - /* Don't include these bytes in the stats. */ - - priv->stats.bytes_read -= bytes_waiting; -} -EXPORT_SYMBOL_GPL(ps3_vuart_clear_rx_bytes); - -/** - * struct list_buffer - An element for a port device fifo buffer list. - */ - -struct list_buffer { - struct list_head link; - const unsigned char *head; - const unsigned char *tail; - unsigned long dbg_number; - unsigned char data[]; -}; - -/** - * ps3_vuart_write - the entry point for writing data to a port - * @dev: The struct ps3_system_bus_device instance. - * - * If the port is idle on entry as much of the incoming data is written to - * the port as the port will accept. Otherwise a list buffer is created - * and any remaning incoming data is copied to that buffer. The buffer is - * then enqueued for transmision via the transmit interrupt. - */ - -int ps3_vuart_write(struct ps3_system_bus_device *dev, const void *buf, - unsigned int bytes) -{ - static unsigned long dbg_number; - int result; - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - unsigned long flags; - struct list_buffer *lb; - - dev_dbg(&dev->core, "%s:%d: %u(%xh) bytes\n", __func__, __LINE__, - bytes, bytes); - - spin_lock_irqsave(&priv->tx_list.lock, flags); - - if (list_empty(&priv->tx_list.head)) { - unsigned long bytes_written; - - result = ps3_vuart_raw_write(dev, buf, bytes, &bytes_written); - - spin_unlock_irqrestore(&priv->tx_list.lock, flags); - - if (result) { - dev_dbg(&dev->core, - "%s:%d: ps3_vuart_raw_write failed\n", - __func__, __LINE__); - return result; - } - - if (bytes_written == bytes) { - dev_dbg(&dev->core, "%s:%d: wrote %xh bytes\n", - __func__, __LINE__, bytes); - return 0; - } - - bytes -= bytes_written; - buf += bytes_written; - } else - spin_unlock_irqrestore(&priv->tx_list.lock, flags); - - lb = kmalloc(sizeof(struct list_buffer) + bytes, GFP_KERNEL); - - if (!lb) { - return -ENOMEM; - } - - memcpy(lb->data, buf, bytes); - lb->head = lb->data; - lb->tail = lb->data + bytes; - lb->dbg_number = ++dbg_number; - - spin_lock_irqsave(&priv->tx_list.lock, flags); - list_add_tail(&lb->link, &priv->tx_list.head); - ps3_vuart_enable_interrupt_tx(dev); - spin_unlock_irqrestore(&priv->tx_list.lock, flags); - - dev_dbg(&dev->core, "%s:%d: queued buf_%lu, %xh bytes\n", - __func__, __LINE__, lb->dbg_number, bytes); - - return 0; -} -EXPORT_SYMBOL_GPL(ps3_vuart_write); - -/** - * ps3_vuart_queue_rx_bytes - Queue waiting bytes into the buffer list. - * @dev: The struct ps3_system_bus_device instance. - * @bytes_queued: Number of bytes queued to the buffer list. - * - * Must be called with priv->rx_list.lock held. - */ - -static int ps3_vuart_queue_rx_bytes(struct ps3_system_bus_device *dev, - u64 *bytes_queued) -{ - static unsigned long dbg_number; - int result; - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - struct list_buffer *lb; - u64 bytes; - - *bytes_queued = 0; - - result = ps3_vuart_get_rx_bytes_waiting(dev, &bytes); - BUG_ON(result); - - if (result) - return -EIO; - - if (!bytes) - return 0; - - /* Add some extra space for recently arrived data. */ - - bytes += 128; - - lb = kmalloc(sizeof(struct list_buffer) + bytes, GFP_ATOMIC); - - if (!lb) - return -ENOMEM; - - ps3_vuart_raw_read(dev, lb->data, bytes, &bytes); - - lb->head = lb->data; - lb->tail = lb->data + bytes; - lb->dbg_number = ++dbg_number; - - list_add_tail(&lb->link, &priv->rx_list.head); - priv->rx_list.bytes_held += bytes; - - dev_dbg(&dev->core, "%s:%d: buf_%lu: queued %lxh bytes\n", - __func__, __LINE__, lb->dbg_number, bytes); - - *bytes_queued = bytes; - - return 0; -} - -/** - * ps3_vuart_read - The entry point for reading data from a port. - * - * Queue data waiting at the port, and if enough bytes to satisfy the request - * are held in the buffer list those bytes are dequeued and copied to the - * caller's buffer. Emptied list buffers are retiered. If the request cannot - * be statified by bytes held in the list buffers -EAGAIN is returned. - */ - -int ps3_vuart_read(struct ps3_system_bus_device *dev, void *buf, - unsigned int bytes) -{ - int result; - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - unsigned long flags; - struct list_buffer *lb, *n; - unsigned long bytes_read; - - dev_dbg(&dev->core, "%s:%d: %u(%xh) bytes\n", __func__, __LINE__, - bytes, bytes); - - spin_lock_irqsave(&priv->rx_list.lock, flags); - - /* Queue rx bytes here for polled reads. */ - - while (priv->rx_list.bytes_held < bytes) { - u64 tmp; - - result = ps3_vuart_queue_rx_bytes(dev, &tmp); - if (result || !tmp) { - dev_dbg(&dev->core, "%s:%d: starved for %lxh bytes\n", - __func__, __LINE__, - bytes - priv->rx_list.bytes_held); - spin_unlock_irqrestore(&priv->rx_list.lock, flags); - return -EAGAIN; - } - } - - list_for_each_entry_safe(lb, n, &priv->rx_list.head, link) { - bytes_read = min((unsigned int)(lb->tail - lb->head), bytes); - - memcpy(buf, lb->head, bytes_read); - buf += bytes_read; - bytes -= bytes_read; - priv->rx_list.bytes_held -= bytes_read; - - if (bytes_read < lb->tail - lb->head) { - lb->head += bytes_read; - dev_dbg(&dev->core, "%s:%d: buf_%lu: dequeued %lxh " - "bytes\n", __func__, __LINE__, lb->dbg_number, - bytes_read); - spin_unlock_irqrestore(&priv->rx_list.lock, flags); - return 0; - } - - dev_dbg(&dev->core, "%s:%d: buf_%lu: free, dequeued %lxh " - "bytes\n", __func__, __LINE__, lb->dbg_number, - bytes_read); - - list_del(&lb->link); - kfree(lb); - } - - spin_unlock_irqrestore(&priv->rx_list.lock, flags); - return 0; -} -EXPORT_SYMBOL_GPL(ps3_vuart_read); - -/** - * ps3_vuart_work - Asynchronous read handler. - */ - -static void ps3_vuart_work(struct work_struct *work) -{ - struct ps3_system_bus_device *dev = - ps3_vuart_work_to_system_bus_dev(work); - struct ps3_vuart_port_driver *drv = - ps3_system_bus_dev_to_vuart_drv(dev); - - BUG_ON(!drv); - drv->work(dev); -} - -int ps3_vuart_read_async(struct ps3_system_bus_device *dev, unsigned int bytes) -{ - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - unsigned long flags; - - if (priv->rx_list.work.trigger) { - dev_dbg(&dev->core, "%s:%d: warning, multiple calls\n", - __func__, __LINE__); - return -EAGAIN; - } - - BUG_ON(!bytes); - - PREPARE_WORK(&priv->rx_list.work.work, ps3_vuart_work); - - spin_lock_irqsave(&priv->rx_list.lock, flags); - if (priv->rx_list.bytes_held >= bytes) { - dev_dbg(&dev->core, "%s:%d: schedule_work %xh bytes\n", - __func__, __LINE__, bytes); - schedule_work(&priv->rx_list.work.work); - spin_unlock_irqrestore(&priv->rx_list.lock, flags); - return 0; - } - - priv->rx_list.work.trigger = bytes; - spin_unlock_irqrestore(&priv->rx_list.lock, flags); - - dev_dbg(&dev->core, "%s:%d: waiting for %u(%xh) bytes\n", __func__, - __LINE__, bytes, bytes); - - return 0; -} -EXPORT_SYMBOL_GPL(ps3_vuart_read_async); - -void ps3_vuart_cancel_async(struct ps3_system_bus_device *dev) -{ - to_port_priv(dev)->rx_list.work.trigger = 0; -} -EXPORT_SYMBOL_GPL(ps3_vuart_cancel_async); - -/** - * ps3_vuart_handle_interrupt_tx - third stage transmit interrupt handler - * - * Services the transmit interrupt for the port. Writes as much data from the - * buffer list as the port will accept. Retires any emptied list buffers and - * adjusts the final list buffer state for a partial write. - */ - -static int ps3_vuart_handle_interrupt_tx(struct ps3_system_bus_device *dev) -{ - int result = 0; - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - unsigned long flags; - struct list_buffer *lb, *n; - unsigned long bytes_total = 0; - - dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); - - spin_lock_irqsave(&priv->tx_list.lock, flags); - - list_for_each_entry_safe(lb, n, &priv->tx_list.head, link) { - - unsigned long bytes_written; - - result = ps3_vuart_raw_write(dev, lb->head, lb->tail - lb->head, - &bytes_written); - - if (result) { - dev_dbg(&dev->core, - "%s:%d: ps3_vuart_raw_write failed\n", - __func__, __LINE__); - break; - } - - bytes_total += bytes_written; - - if (bytes_written < lb->tail - lb->head) { - lb->head += bytes_written; - dev_dbg(&dev->core, - "%s:%d cleared buf_%lu, %lxh bytes\n", - __func__, __LINE__, lb->dbg_number, - bytes_written); - goto port_full; - } - - dev_dbg(&dev->core, "%s:%d free buf_%lu\n", __func__, __LINE__, - lb->dbg_number); - - list_del(&lb->link); - kfree(lb); - } - - ps3_vuart_disable_interrupt_tx(dev); -port_full: - spin_unlock_irqrestore(&priv->tx_list.lock, flags); - dev_dbg(&dev->core, "%s:%d wrote %lxh bytes total\n", - __func__, __LINE__, bytes_total); - return result; -} - -/** - * ps3_vuart_handle_interrupt_rx - third stage receive interrupt handler - * - * Services the receive interrupt for the port. Creates a list buffer and - * copies all waiting port data to that buffer and enqueues the buffer in the - * buffer list. Buffer list data is dequeued via ps3_vuart_read. - */ - -static int ps3_vuart_handle_interrupt_rx(struct ps3_system_bus_device *dev) -{ - int result; - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - unsigned long flags; - u64 bytes; - - dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); - - spin_lock_irqsave(&priv->rx_list.lock, flags); - result = ps3_vuart_queue_rx_bytes(dev, &bytes); - - if (result) { - spin_unlock_irqrestore(&priv->rx_list.lock, flags); - return result; - } - - if (priv->rx_list.work.trigger && priv->rx_list.bytes_held - >= priv->rx_list.work.trigger) { - dev_dbg(&dev->core, "%s:%d: schedule_work %lxh bytes\n", - __func__, __LINE__, priv->rx_list.work.trigger); - priv->rx_list.work.trigger = 0; - schedule_work(&priv->rx_list.work.work); - } - - spin_unlock_irqrestore(&priv->rx_list.lock, flags); - return result; -} - -static int ps3_vuart_handle_interrupt_disconnect( - struct ps3_system_bus_device *dev) -{ - dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); - BUG_ON("no support"); - return -1; -} - -/** - * ps3_vuart_handle_port_interrupt - second stage interrupt handler - * - * Services any pending interrupt types for the port. Passes control to the - * third stage type specific interrupt handler. Returns control to the first - * stage handler after one iteration. - */ - -static int ps3_vuart_handle_port_interrupt(struct ps3_system_bus_device *dev) -{ - int result; - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - unsigned long status; - - result = ps3_vuart_get_interrupt_status(dev, &status); - - if (result) - return result; - - dev_dbg(&dev->core, "%s:%d: status: %lxh\n", __func__, __LINE__, - status); - - if (status & INTERRUPT_MASK_DISCONNECT) { - priv->stats.disconnect_interrupts++; - result = ps3_vuart_handle_interrupt_disconnect(dev); - if (result) - ps3_vuart_disable_interrupt_disconnect(dev); - } - - if (status & INTERRUPT_MASK_TX) { - priv->stats.tx_interrupts++; - result = ps3_vuart_handle_interrupt_tx(dev); - if (result) - ps3_vuart_disable_interrupt_tx(dev); - } - - if (status & INTERRUPT_MASK_RX) { - priv->stats.rx_interrupts++; - result = ps3_vuart_handle_interrupt_rx(dev); - if (result) - ps3_vuart_disable_interrupt_rx(dev); - } - - return 0; -} - -struct vuart_bus_priv { - struct ports_bmp *bmp; - unsigned int virq; - struct semaphore probe_mutex; - int use_count; - struct ps3_system_bus_device *devices[PORT_COUNT]; -} static vuart_bus_priv; - -/** - * ps3_vuart_irq_handler - first stage interrupt handler - * - * Loops finding any interrupting port and its associated instance data. - * Passes control to the second stage port specific interrupt handler. Loops - * until all outstanding interrupts are serviced. - */ - -static irqreturn_t ps3_vuart_irq_handler(int irq, void *_private) -{ - struct vuart_bus_priv *bus_priv = _private; - - BUG_ON(!bus_priv); - - while (1) { - unsigned int port; - - dump_ports_bmp(bus_priv->bmp); - - port = (BITS_PER_LONG - 1) - __ilog2(bus_priv->bmp->status); - - if (port == BITS_PER_LONG) - break; - - BUG_ON(port >= PORT_COUNT); - BUG_ON(!bus_priv->devices[port]); - - ps3_vuart_handle_port_interrupt(bus_priv->devices[port]); - } - - return IRQ_HANDLED; -} - -static int ps3_vuart_bus_interrupt_get(void) -{ - int result; - - pr_debug(" -> %s:%d\n", __func__, __LINE__); - - vuart_bus_priv.use_count++; - - BUG_ON(vuart_bus_priv.use_count > 2); - - if (vuart_bus_priv.use_count != 1) { - return 0; - } - - BUG_ON(vuart_bus_priv.bmp); - - vuart_bus_priv.bmp = kzalloc(sizeof(struct ports_bmp), GFP_KERNEL); - - if (!vuart_bus_priv.bmp) { - pr_debug("%s:%d: kzalloc failed.\n", __func__, __LINE__); - result = -ENOMEM; - goto fail_bmp_malloc; - } - - result = ps3_vuart_irq_setup(PS3_BINDING_CPU_ANY, vuart_bus_priv.bmp, - &vuart_bus_priv.virq); - - if (result) { - pr_debug("%s:%d: ps3_vuart_irq_setup failed (%d)\n", - __func__, __LINE__, result); - result = -EPERM; - goto fail_alloc_irq; - } - - result = request_irq(vuart_bus_priv.virq, ps3_vuart_irq_handler, - IRQF_DISABLED, "vuart", &vuart_bus_priv); - - if (result) { - pr_debug("%s:%d: request_irq failed (%d)\n", - __func__, __LINE__, result); - goto fail_request_irq; - } - - pr_debug(" <- %s:%d: ok\n", __func__, __LINE__); - return result; - -fail_request_irq: - ps3_vuart_irq_destroy(vuart_bus_priv.virq); - vuart_bus_priv.virq = NO_IRQ; -fail_alloc_irq: - kfree(vuart_bus_priv.bmp); - vuart_bus_priv.bmp = NULL; -fail_bmp_malloc: - vuart_bus_priv.use_count--; - pr_debug(" <- %s:%d: failed\n", __func__, __LINE__); - return result; -} - -static int ps3_vuart_bus_interrupt_put(void) -{ - pr_debug(" -> %s:%d\n", __func__, __LINE__); - - vuart_bus_priv.use_count--; - - BUG_ON(vuart_bus_priv.use_count < 0); - - if (vuart_bus_priv.use_count != 0) - return 0; - - free_irq(vuart_bus_priv.virq, &vuart_bus_priv); - - ps3_vuart_irq_destroy(vuart_bus_priv.virq); - vuart_bus_priv.virq = NO_IRQ; - - kfree(vuart_bus_priv.bmp); - vuart_bus_priv.bmp = NULL; - - pr_debug(" <- %s:%d\n", __func__, __LINE__); - return 0; -} - -static int ps3_vuart_probe(struct ps3_system_bus_device *dev) -{ - int result; - struct ps3_vuart_port_driver *drv; - struct ps3_vuart_port_priv *priv = NULL; - - dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); - - drv = ps3_system_bus_dev_to_vuart_drv(dev); - - dev_dbg(&dev->core, "%s:%d: (%s)\n", __func__, __LINE__, - drv->core.core.name); - - BUG_ON(!drv); - - if (dev->port_number >= PORT_COUNT) { - BUG(); - return -EINVAL; - } - - down(&vuart_bus_priv.probe_mutex); - - result = ps3_vuart_bus_interrupt_get(); - - if (result) - goto fail_setup_interrupt; - - if (vuart_bus_priv.devices[dev->port_number]) { - dev_dbg(&dev->core, "%s:%d: port busy (%d)\n", __func__, - __LINE__, dev->port_number); - result = -EBUSY; - goto fail_busy; - } - - vuart_bus_priv.devices[dev->port_number] = dev; - - /* Setup dev->driver_priv. */ - - dev->driver_priv = kzalloc(sizeof(struct ps3_vuart_port_priv), - GFP_KERNEL); - - if (!dev->driver_priv) { - result = -ENOMEM; - goto fail_dev_malloc; - } - - priv = to_port_priv(dev); - - INIT_LIST_HEAD(&priv->tx_list.head); - spin_lock_init(&priv->tx_list.lock); - - INIT_LIST_HEAD(&priv->rx_list.head); - spin_lock_init(&priv->rx_list.lock); - - INIT_WORK(&priv->rx_list.work.work, NULL); - priv->rx_list.work.trigger = 0; - priv->rx_list.work.dev = dev; - - /* clear stale pending interrupts */ - - ps3_vuart_clear_rx_bytes(dev, 0); - - ps3_vuart_set_interrupt_mask(dev, INTERRUPT_MASK_RX); - - ps3_vuart_set_triggers(dev, 1, 1); - - if (drv->probe) - result = drv->probe(dev); - else { - result = 0; - dev_info(&dev->core, "%s:%d: no probe method\n", __func__, - __LINE__); - } - - if (result) { - dev_dbg(&dev->core, "%s:%d: drv->probe failed\n", - __func__, __LINE__); - down(&vuart_bus_priv.probe_mutex); - goto fail_probe; - } - - up(&vuart_bus_priv.probe_mutex); - - return result; - -fail_probe: - ps3_vuart_set_interrupt_mask(dev, 0); - kfree(dev->driver_priv); - dev->driver_priv = NULL; -fail_dev_malloc: - vuart_bus_priv.devices[dev->port_number] = NULL; -fail_busy: - ps3_vuart_bus_interrupt_put(); -fail_setup_interrupt: - up(&vuart_bus_priv.probe_mutex); - dev_dbg(&dev->core, "%s:%d: failed\n", __func__, __LINE__); - return result; -} - -/** - * ps3_vuart_cleanup - common cleanup helper. - * @dev: The struct ps3_system_bus_device instance. - * - * Cleans interrupts and HV resources. Must be called with - * vuart_bus_priv.probe_mutex held. Used by ps3_vuart_remove and - * ps3_vuart_shutdown. After this call, polled reading will still work. - */ - -static int ps3_vuart_cleanup(struct ps3_system_bus_device *dev) -{ - dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); - - ps3_vuart_cancel_async(dev); - ps3_vuart_set_interrupt_mask(dev, 0); - ps3_vuart_bus_interrupt_put(); - return 0; -} - -/** - * ps3_vuart_remove - Completely clean the device instance. - * @dev: The struct ps3_system_bus_device instance. - * - * Cleans all memory, interrupts and HV resources. After this call the - * device can no longer be used. - */ - -static int ps3_vuart_remove(struct ps3_system_bus_device *dev) -{ - struct ps3_vuart_port_priv *priv = to_port_priv(dev); - struct ps3_vuart_port_driver *drv; - - BUG_ON(!dev); - - down(&vuart_bus_priv.probe_mutex); - - dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__, - dev->match_id); - - if (!dev->core.driver) { - dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__, - __LINE__); - up(&vuart_bus_priv.probe_mutex); - return 0; - } - - drv = ps3_system_bus_dev_to_vuart_drv(dev); - - BUG_ON(!drv); - - if (drv->remove) { - drv->remove(dev); - } else { - dev_dbg(&dev->core, "%s:%d: no remove method\n", __func__, - __LINE__); - BUG(); - } - - ps3_vuart_cleanup(dev); - - vuart_bus_priv.devices[dev->port_number] = NULL; - kfree(priv); - priv = NULL; - - dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__); - up(&vuart_bus_priv.probe_mutex); - return 0; -} - -/** - * ps3_vuart_shutdown - Cleans interrupts and HV resources. - * @dev: The struct ps3_system_bus_device instance. - * - * Cleans interrupts and HV resources. After this call the - * device can still be used in polling mode. This behavior required - * by sys-manager to be able to complete the device power operation - * sequence. - */ - -static int ps3_vuart_shutdown(struct ps3_system_bus_device *dev) -{ - struct ps3_vuart_port_driver *drv; - - BUG_ON(!dev); - - down(&vuart_bus_priv.probe_mutex); - - dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__, - dev->match_id); - - if (!dev->core.driver) { - dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__, - __LINE__); - up(&vuart_bus_priv.probe_mutex); - return 0; - } - - drv = ps3_system_bus_dev_to_vuart_drv(dev); - - BUG_ON(!drv); - - if (drv->shutdown) - drv->shutdown(dev); - else if (drv->remove) { - dev_dbg(&dev->core, "%s:%d: no shutdown, calling remove\n", - __func__, __LINE__); - drv->remove(dev); - } else { - dev_dbg(&dev->core, "%s:%d: no shutdown method\n", __func__, - __LINE__); - BUG(); - } - - ps3_vuart_cleanup(dev); - - dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__); - - up(&vuart_bus_priv.probe_mutex); - return 0; -} - -static int __init ps3_vuart_bus_init(void) -{ - pr_debug("%s:%d:\n", __func__, __LINE__); - - if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) - return -ENODEV; - - init_MUTEX(&vuart_bus_priv.probe_mutex); - - return 0; -} - -static void __exit ps3_vuart_bus_exit(void) -{ - pr_debug("%s:%d:\n", __func__, __LINE__); -} - -core_initcall(ps3_vuart_bus_init); -module_exit(ps3_vuart_bus_exit); - -/** - * ps3_vuart_port_driver_register - Add a vuart port device driver. - */ - -int ps3_vuart_port_driver_register(struct ps3_vuart_port_driver *drv) -{ - int result; - - pr_debug("%s:%d: (%s)\n", __func__, __LINE__, drv->core.core.name); - - BUG_ON(!drv->core.match_id); - BUG_ON(!drv->core.core.name); - - drv->core.probe = ps3_vuart_probe; - drv->core.remove = ps3_vuart_remove; - drv->core.shutdown = ps3_vuart_shutdown; - - result = ps3_system_bus_driver_register(&drv->core); - return result; -} -EXPORT_SYMBOL_GPL(ps3_vuart_port_driver_register); - -/** - * ps3_vuart_port_driver_unregister - Remove a vuart port device driver. - */ - -void ps3_vuart_port_driver_unregister(struct ps3_vuart_port_driver *drv) -{ - pr_debug("%s:%d: (%s)\n", __func__, __LINE__, drv->core.core.name); - ps3_system_bus_driver_unregister(&drv->core); -} -EXPORT_SYMBOL_GPL(ps3_vuart_port_driver_unregister); -- cgit v1.2.3-59-g8ed1b