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Release 4.10 drivers/ps3/ps3-vuart.c

Directory: drivers/ps3
/*
 *  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 <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/bitops.h>
#include <asm/ps3.h>

#include <asm/firmware.h>
#include <asm/lv1call.h>

#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; }

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/** * 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: %016llxh\n", func, line, bmp->status); }

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#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 }

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int ps3_vuart_get_triggers(struct ps3_system_bus_device *dev, struct vuart_triggers *trig) { int result; u64 size; u64 val; u64 tx; result = lv1_get_virtual_uart_param(dev->port_number, PARAM_TX_TRIGGER, &tx); trig->tx = 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; }

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int ps3_vuart_set_triggers(struct ps3_system_bus_device *dev, unsigned int tx, unsigned int rx) { int result; u64 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; }

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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: %llxh\n", __func__, __LINE__, *bytes_waiting); return result; }

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/** * 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; }

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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 %llxh, s %llxh, m&s %lxh\n", __func__, __LINE__, priv->interrupt_mask, tmp, *status); return result; }

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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); }

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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); }

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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); }

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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; }

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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; }

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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; }

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/** * 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, u64 *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 %llxh/%xh=>%lxh\n", __func__, __LINE__, *bytes_written, bytes, priv->stats.bytes_written); return result; }

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/** * 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, u64 *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 %llxh/%xh=>%lxh\n", __func__, __LINE__, *bytes_read, bytes, priv->stats.bytes_read); return result; }

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/** * 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; }

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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)) { u64 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; }

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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 %llxh bytes\n", __func__, __LINE__, lb->dbg_number, bytes); *bytes_queued = bytes; return 0; }

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/** * 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; }

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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); }

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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); 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; }

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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; }

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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) { u64 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, %llxh 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; }

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stephen rothwellstephen rothwell20.82%125.00%
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/** * 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; }

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geoffrey levandgeoffrey levand173100.00%4100.00%
Total173100.00%4100.00%


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; }

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geoffrey levandgeoffrey levand34100.00%2100.00%
Total34100.00%2100.00%

/** * 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; }

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geoffrey levandgeoffrey levand157100.00%3100.00%
Total157100.00%3100.00%

struct vuart_bus_priv { struct ports_bmp *bmp; unsigned int virq; struct mutex 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; }

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geoffrey levandgeoffrey levand98100.00%3100.00%
Total98100.00%3100.00%


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, 0, "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 = 0; 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; }

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geoffrey levandgeoffrey levand23199.14%360.00%
yong zhangyong zhang10.43%120.00%
michael ellermanmichael ellerman10.43%120.00%
Total233100.00%5100.00%


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 = 0; kfree(vuart_bus_priv.bmp); vuart_bus_priv.bmp = NULL; pr_debug(" <- %s:%d\n", __func__, __LINE__); return 0; }

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geoffrey levandgeoffrey levand8998.89%150.00%
michael ellermanmichael ellerman11.11%150.00%
Total90100.00%2100.00%


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); BUG_ON(!drv); dev_dbg(&dev->core, "%s:%d: (%s)\n", __func__, __LINE__, drv->core.core.name); if (dev->port_number >= PORT_COUNT) { BUG(); return -EINVAL; } mutex_lock(&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, ps3_vuart_work); 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__); goto fail_probe; } mutex_unlock(&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: mutex_unlock(&vuart_bus_priv.probe_mutex); dev_dbg(&dev->core, "%s:%d: failed\n", __func__, __LINE__); return result; }

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geoffrey levandgeoffrey levand42998.17%562.50%
colin kingcolin king61.37%112.50%
tejun heotejun heo10.23%112.50%
al viroal viro10.23%112.50%
Total437100.00%8100.00%

/** * 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; }

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geoffrey levandgeoffrey levand43100.00%2100.00%
Total43100.00%2100.00%

/** * 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); mutex_lock(&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__); mutex_unlock(&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__); mutex_unlock(&vuart_bus_priv.probe_mutex); return 0; }

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geoffrey levandgeoffrey levand19199.48%480.00%
al viroal viro10.52%120.00%
Total192100.00%5100.00%

/** * 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); mutex_lock(&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__); mutex_unlock(&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__); mutex_unlock(&vuart_bus_priv.probe_mutex); return 0; }

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geoffrey levandgeoffrey levand13168.95%266.67%
geert uytterhoevengeert uytterhoeven5931.05%133.33%
Total190100.00%3100.00%


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; mutex_init(&vuart_bus_priv.probe_mutex); return 0; }

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geoffrey levandgeoffrey levand3995.12%480.00%
geert uytterhoevengeert uytterhoeven24.88%120.00%
Total41100.00%5100.00%


static void __exit ps3_vuart_bus_exit(void) { pr_debug("%s:%d:\n", __func__, __LINE__); }

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geoffrey levandgeoffrey levand18100.00%3100.00%
Total18100.00%3100.00%

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; }

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geoffrey levandgeoffrey levand89100.00%3100.00%
Total89100.00%3100.00%

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); }

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geoffrey levandgeoffrey levand35100.00%3100.00%
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EXPORT_SYMBOL_GPL(ps3_vuart_port_driver_unregister);

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geoffrey levandgeoffrey levand486897.95%635.29%
geert uytterhoevengeert uytterhoeven611.23%211.76%
stephen rothwellstephen rothwell220.44%211.76%
colin kingcolin king60.12%15.88%
jiri slabyjiri slaby40.08%15.88%
tejun heotejun heo40.08%211.76%
al viroal viro20.04%15.88%
michael ellermanmichael ellerman20.04%15.88%
yong zhangyong zhang10.02%15.88%
Total4970100.00%17100.00%
Directory: drivers/ps3
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