Revision 8ef8286689c6b5bc76212437b85bdd2ba749ee44 authored by Christoph Lameter on 20 February 2007, 21:57:52 UTC, committed by Linus Torvalds on 21 February 2007, 01:10:13 UTC
The alien cache is a per cpu per node array allocated for every slab on the system. Currently we size this array for all nodes that the kernel does support. For IA64 this is 1024 nodes. So we allocate an array with 1024 objects even if we only boot a system with 4 nodes. This patch uses "nr_node_ids" to determine the number of possible nodes supported by a hardware configuration and only allocates an alien cache sized for possible nodes. The initialization of nr_node_ids occurred too late relative to the bootstrap of the slab allocator and so I moved the setup_nr_node_ids() into free_area_init_nodes(). Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 53b8a31
vuart.c
/*
* 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/module.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <asm/ps3.h>
#include <asm/firmware.h>
#include <asm/lv1call.h>
#include <asm/bitops.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 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)));
/* redefine dev_dbg to do a syntax check */
#if !defined(DEBUG)
#undef dev_dbg
static inline int __attribute__ ((format (printf, 2, 3))) dev_dbg(
const struct device *_dev, const char *fmt, ...) {return 0;}
#endif
#define dump_ports_bmp(_b) _dump_ports_bmp(_b, __func__, __LINE__)
static void __attribute__ ((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);
}
static int ps3_vuart_match_id_to_port(enum ps3_match_id match_id,
unsigned int *port_number)
{
switch(match_id) {
case PS3_MATCH_ID_AV_SETTINGS:
*port_number = 0;
return 0;
case PS3_MATCH_ID_SYSTEM_MANAGER:
*port_number = 2;
return 0;
default:
WARN_ON(1);
*port_number = UINT_MAX;
return -EINVAL;
};
}
#define dump_port_params(_b) _dump_port_params(_b, __func__, __LINE__)
static void __attribute__ ((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_vuart_port_device *dev,
struct vuart_triggers *trig)
{
int result;
unsigned long size;
unsigned long val;
result = lv1_get_virtual_uart_param(dev->priv->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->priv->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->priv->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_vuart_port_device *dev, unsigned int tx,
unsigned int rx)
{
int result;
unsigned long size;
result = lv1_set_virtual_uart_param(dev->priv->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->priv->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->priv->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_vuart_port_device *dev,
u64 *bytes_waiting)
{
int result = lv1_get_virtual_uart_param(dev->priv->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;
}
static int ps3_vuart_set_interrupt_mask(struct ps3_vuart_port_device *dev,
unsigned long mask)
{
int result;
dev_dbg(&dev->core, "%s:%d: %lxh\n", __func__, __LINE__, mask);
dev->priv->interrupt_mask = mask;
result = lv1_set_virtual_uart_param(dev->priv->port_number,
PARAM_INTERRUPT_MASK, dev->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_vuart_port_device *dev,
unsigned long *status)
{
u64 tmp;
int result = lv1_get_virtual_uart_param(dev->priv->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 & dev->priv->interrupt_mask;
dev_dbg(&dev->core, "%s:%d: m %lxh, s %lxh, m&s %lxh\n",
__func__, __LINE__, dev->priv->interrupt_mask, tmp, *status);
return result;
}
int ps3_vuart_enable_interrupt_tx(struct ps3_vuart_port_device *dev)
{
return (dev->priv->interrupt_mask & INTERRUPT_MASK_TX) ? 0
: ps3_vuart_set_interrupt_mask(dev, dev->priv->interrupt_mask
| INTERRUPT_MASK_TX);
}
int ps3_vuart_enable_interrupt_rx(struct ps3_vuart_port_device *dev)
{
return (dev->priv->interrupt_mask & INTERRUPT_MASK_RX) ? 0
: ps3_vuart_set_interrupt_mask(dev, dev->priv->interrupt_mask
| INTERRUPT_MASK_RX);
}
int ps3_vuart_enable_interrupt_disconnect(struct ps3_vuart_port_device *dev)
{
return (dev->priv->interrupt_mask & INTERRUPT_MASK_DISCONNECT) ? 0
: ps3_vuart_set_interrupt_mask(dev, dev->priv->interrupt_mask
| INTERRUPT_MASK_DISCONNECT);
}
int ps3_vuart_disable_interrupt_tx(struct ps3_vuart_port_device *dev)
{
return (dev->priv->interrupt_mask & INTERRUPT_MASK_TX)
? ps3_vuart_set_interrupt_mask(dev, dev->priv->interrupt_mask
& ~INTERRUPT_MASK_TX) : 0;
}
int ps3_vuart_disable_interrupt_rx(struct ps3_vuart_port_device *dev)
{
return (dev->priv->interrupt_mask & INTERRUPT_MASK_RX)
? ps3_vuart_set_interrupt_mask(dev, dev->priv->interrupt_mask
& ~INTERRUPT_MASK_RX) : 0;
}
int ps3_vuart_disable_interrupt_disconnect(struct ps3_vuart_port_device *dev)
{
return (dev->priv->interrupt_mask & INTERRUPT_MASK_DISCONNECT)
? ps3_vuart_set_interrupt_mask(dev, dev->priv->interrupt_mask
& ~INTERRUPT_MASK_DISCONNECT) : 0;
}
/**
* ps3_vuart_raw_write - Low level write helper.
*
* Do not call ps3_vuart_raw_write directly, use ps3_vuart_write.
*/
static int ps3_vuart_raw_write(struct ps3_vuart_port_device *dev,
const void* buf, unsigned int bytes, unsigned long *bytes_written)
{
int result;
result = lv1_write_virtual_uart(dev->priv->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;
}
dev->priv->stats.bytes_written += *bytes_written;
dev_dbg(&dev->core, "%s:%d: wrote %lxh/%xh=>%lxh\n", __func__, __LINE__,
*bytes_written, bytes, dev->priv->stats.bytes_written);
return result;
}
/**
* ps3_vuart_raw_read - Low level read helper.
*
* Do not call ps3_vuart_raw_read directly, use ps3_vuart_read.
*/
static int ps3_vuart_raw_read(struct ps3_vuart_port_device *dev, void* buf,
unsigned int bytes, unsigned long *bytes_read)
{
int result;
dev_dbg(&dev->core, "%s:%d: %xh\n", __func__, __LINE__, bytes);
result = lv1_read_virtual_uart(dev->priv->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;
}
dev->priv->stats.bytes_read += *bytes_read;
dev_dbg(&dev->core, "%s:%d: read %lxh/%xh=>%lxh\n", __func__, __LINE__,
*bytes_read, bytes, dev->priv->stats.bytes_read);
return result;
}
/**
* ps3_vuart_clear_rx_bytes - Discard bytes received.
* @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_vuart_port_device *dev,
unsigned int bytes)
{
int result;
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. */
dev->priv->stats.bytes_read -= bytes_waiting;
}
/**
* 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
*
* 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_vuart_port_device *dev, const void* buf,
unsigned int bytes)
{
static unsigned long dbg_number;
int result;
unsigned long flags;
struct list_buffer *lb;
dev_dbg(&dev->core, "%s:%d: %u(%xh) bytes\n", __func__, __LINE__,
bytes, bytes);
spin_lock_irqsave(&dev->priv->tx_list.lock, flags);
if (list_empty(&dev->priv->tx_list.head)) {
unsigned long bytes_written;
result = ps3_vuart_raw_write(dev, buf, bytes, &bytes_written);
spin_unlock_irqrestore(&dev->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(&dev->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(&dev->priv->tx_list.lock, flags);
list_add_tail(&lb->link, &dev->priv->tx_list.head);
ps3_vuart_enable_interrupt_tx(dev);
spin_unlock_irqrestore(&dev->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;
}
/**
* ps3_vuart_read - the entry point for reading data from a port
*
* 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_vuart_port_device *dev, void* buf,
unsigned int bytes)
{
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(&dev->priv->rx_list.lock, flags);
if (dev->priv->rx_list.bytes_held < bytes) {
spin_unlock_irqrestore(&dev->priv->rx_list.lock, flags);
dev_dbg(&dev->core, "%s:%d: starved for %lxh bytes\n",
__func__, __LINE__,
bytes - dev->priv->rx_list.bytes_held);
return -EAGAIN;
}
list_for_each_entry_safe(lb, n, &dev->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;
dev->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(&dev->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(&dev->priv->rx_list.lock, flags);
return 0;
}
int ps3_vuart_read_async(struct ps3_vuart_port_device *dev, work_func_t func,
unsigned int bytes)
{
unsigned long flags;
if(dev->priv->work.trigger) {
dev_dbg(&dev->core, "%s:%d: warning, multiple calls\n",
__func__, __LINE__);
return -EAGAIN;
}
BUG_ON(!bytes);
PREPARE_WORK(&dev->priv->work.work, func);
spin_lock_irqsave(&dev->priv->work.lock, flags);
if(dev->priv->rx_list.bytes_held >= bytes) {
dev_dbg(&dev->core, "%s:%d: schedule_work %xh bytes\n",
__func__, __LINE__, bytes);
schedule_work(&dev->priv->work.work);
spin_unlock_irqrestore(&dev->priv->work.lock, flags);
return 0;
}
dev->priv->work.trigger = bytes;
spin_unlock_irqrestore(&dev->priv->work.lock, flags);
dev_dbg(&dev->core, "%s:%d: waiting for %u(%xh) bytes\n", __func__,
__LINE__, bytes, bytes);
return 0;
}
void ps3_vuart_cancel_async(struct ps3_vuart_port_device *dev)
{
dev->priv->work.trigger = 0;
}
/**
* 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_vuart_port_device *dev)
{
int result = 0;
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(&dev->priv->tx_list.lock, flags);
list_for_each_entry_safe(lb, n, &dev->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(&dev->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_vuart_port_device *dev)
{
static unsigned long dbg_number;
int result = 0;
unsigned long flags;
struct list_buffer *lb;
unsigned long bytes;
dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
result = ps3_vuart_get_rx_bytes_waiting(dev, &bytes);
if (result)
return -EIO;
BUG_ON(!bytes);
/* 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;
spin_lock_irqsave(&dev->priv->rx_list.lock, flags);
list_add_tail(&lb->link, &dev->priv->rx_list.head);
dev->priv->rx_list.bytes_held += bytes;
spin_unlock_irqrestore(&dev->priv->rx_list.lock, flags);
dev_dbg(&dev->core, "%s:%d: buf_%lu: queued %lxh bytes\n",
__func__, __LINE__, lb->dbg_number, bytes);
spin_lock_irqsave(&dev->priv->work.lock, flags);
if(dev->priv->work.trigger
&& dev->priv->rx_list.bytes_held >= dev->priv->work.trigger) {
dev_dbg(&dev->core, "%s:%d: schedule_work %lxh bytes\n",
__func__, __LINE__, dev->priv->work.trigger);
dev->priv->work.trigger = 0;
schedule_work(&dev->priv->work.work);
}
spin_unlock_irqrestore(&dev->priv->work.lock, flags);
return 0;
}
static int ps3_vuart_handle_interrupt_disconnect(
struct ps3_vuart_port_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_vuart_port_device *dev)
{
int result;
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) {
dev->priv->stats.disconnect_interrupts++;
result = ps3_vuart_handle_interrupt_disconnect(dev);
if (result)
ps3_vuart_disable_interrupt_disconnect(dev);
}
if (status & INTERRUPT_MASK_TX) {
dev->priv->stats.tx_interrupts++;
result = ps3_vuart_handle_interrupt_tx(dev);
if (result)
ps3_vuart_disable_interrupt_tx(dev);
}
if (status & INTERRUPT_MASK_RX) {
dev->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 {
const struct ports_bmp bmp;
unsigned int virq;
struct semaphore probe_mutex;
int use_count;
struct ps3_vuart_port_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;
BUG_ON(!_private);
bus_priv = (struct vuart_bus_priv *)_private;
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_match(struct device *_dev, struct device_driver *_drv)
{
int result;
struct ps3_vuart_port_driver *drv = to_ps3_vuart_port_driver(_drv);
struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev);
result = dev->match_id == drv->match_id;
dev_info(&dev->core, "%s:%d: dev=%u(%s), drv=%u(%s): %s\n", __func__,
__LINE__, dev->match_id, dev->core.bus_id, drv->match_id,
drv->core.name, (result ? "match" : "miss"));
return result;
}
static int ps3_vuart_probe(struct device *_dev)
{
int result;
unsigned int port_number;
struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev);
struct ps3_vuart_port_driver *drv =
to_ps3_vuart_port_driver(_dev->driver);
dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
BUG_ON(!drv);
down(&vuart_bus_priv.probe_mutex);
/* Setup vuart_bus_priv.devices[]. */
result = ps3_vuart_match_id_to_port(dev->match_id,
&port_number);
if (result) {
dev_dbg(&dev->core, "%s:%d: unknown match_id (%d)\n",
__func__, __LINE__, dev->match_id);
result = -EINVAL;
goto fail_match;
}
if (vuart_bus_priv.devices[port_number]) {
dev_dbg(&dev->core, "%s:%d: port busy (%d)\n", __func__,
__LINE__, port_number);
result = -EBUSY;
goto fail_match;
}
vuart_bus_priv.devices[port_number] = dev;
/* Setup dev->priv. */
dev->priv = kzalloc(sizeof(struct ps3_vuart_port_priv), GFP_KERNEL);
if (!dev->priv) {
result = -ENOMEM;
goto fail_alloc;
}
dev->priv->port_number = port_number;
INIT_LIST_HEAD(&dev->priv->tx_list.head);
spin_lock_init(&dev->priv->tx_list.lock);
INIT_LIST_HEAD(&dev->priv->rx_list.head);
spin_lock_init(&dev->priv->rx_list.lock);
INIT_WORK(&dev->priv->work.work, NULL);
spin_lock_init(&dev->priv->work.lock);
dev->priv->work.trigger = 0;
dev->priv->work.dev = dev;
if (++vuart_bus_priv.use_count == 1) {
result = ps3_alloc_vuart_irq(PS3_BINDING_CPU_ANY,
(void*)&vuart_bus_priv.bmp.status, &vuart_bus_priv.virq);
if (result) {
dev_dbg(&dev->core,
"%s:%d: ps3_alloc_vuart_irq 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) {
dev_info(&dev->core, "%s:%d: request_irq failed (%d)\n",
__func__, __LINE__, result);
goto fail_request_irq;
}
}
/* 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);
fail_request_irq:
ps3_free_vuart_irq(vuart_bus_priv.virq);
vuart_bus_priv.virq = NO_IRQ;
fail_alloc_irq:
--vuart_bus_priv.use_count;
kfree(dev->priv);
dev->priv = NULL;
fail_alloc:
vuart_bus_priv.devices[port_number] = 0;
fail_match:
up(&vuart_bus_priv.probe_mutex);
dev_dbg(&dev->core, "%s:%d failed\n", __func__, __LINE__);
return result;
}
static int ps3_vuart_remove(struct device *_dev)
{
struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev);
struct ps3_vuart_port_driver *drv =
to_ps3_vuart_port_driver(_dev->driver);
down(&vuart_bus_priv.probe_mutex);
dev_dbg(&dev->core, "%s:%d: %s\n", __func__, __LINE__,
dev->core.bus_id);
BUG_ON(vuart_bus_priv.use_count < 1);
if (drv->remove)
drv->remove(dev);
else
dev_dbg(&dev->core, "%s:%d: %s no remove method\n", __func__,
__LINE__, dev->core.bus_id);
vuart_bus_priv.devices[dev->priv->port_number] = 0;
if (--vuart_bus_priv.use_count == 0) {
BUG();
free_irq(vuart_bus_priv.virq, &vuart_bus_priv);
ps3_free_vuart_irq(vuart_bus_priv.virq);
vuart_bus_priv.virq = NO_IRQ;
}
kfree(dev->priv);
dev->priv = NULL;
up(&vuart_bus_priv.probe_mutex);
return 0;
}
static void ps3_vuart_shutdown(struct device *_dev)
{
struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev);
struct ps3_vuart_port_driver *drv =
to_ps3_vuart_port_driver(_dev->driver);
dev_dbg(&dev->core, "%s:%d: %s\n", __func__, __LINE__,
dev->core.bus_id);
if (drv->shutdown)
drv->shutdown(dev);
else
dev_dbg(&dev->core, "%s:%d: %s no shutdown method\n", __func__,
__LINE__, dev->core.bus_id);
}
/**
* ps3_vuart_bus - The vuart bus instance.
*
* The vuart is managed as a bus that port devices connect to.
*/
struct bus_type ps3_vuart_bus = {
.name = "ps3_vuart",
.match = ps3_vuart_match,
.probe = ps3_vuart_probe,
.remove = ps3_vuart_remove,
.shutdown = ps3_vuart_shutdown,
};
int __init ps3_vuart_bus_init(void)
{
int result;
pr_debug("%s:%d:\n", __func__, __LINE__);
if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
return 0;
init_MUTEX(&vuart_bus_priv.probe_mutex);
result = bus_register(&ps3_vuart_bus);
BUG_ON(result);
return result;
}
void __exit ps3_vuart_bus_exit(void)
{
pr_debug("%s:%d:\n", __func__, __LINE__);
bus_unregister(&ps3_vuart_bus);
}
core_initcall(ps3_vuart_bus_init);
module_exit(ps3_vuart_bus_exit);
/**
* ps3_vuart_port_release_device - Remove a vuart port device.
*/
static void ps3_vuart_port_release_device(struct device *_dev)
{
#if defined(DEBUG)
struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev);
dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
BUG_ON(dev->priv && "forgot to free");
memset(&dev->core, 0, sizeof(dev->core));
#endif
}
/**
* ps3_vuart_port_device_register - Add a vuart port device.
*/
int ps3_vuart_port_device_register(struct ps3_vuart_port_device *dev)
{
static unsigned int dev_count = 1;
BUG_ON(dev->priv && "forgot to free");
dev->core.parent = NULL;
dev->core.bus = &ps3_vuart_bus;
dev->core.release = ps3_vuart_port_release_device;
snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), "vuart_%02x",
dev_count++);
dev_dbg(&dev->core, "%s:%d register\n", __func__, __LINE__);
return device_register(&dev->core);
}
EXPORT_SYMBOL_GPL(ps3_vuart_port_device_register);
/**
* 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.name);
drv->core.bus = &ps3_vuart_bus;
result = 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.name);
driver_unregister(&drv->core);
}
EXPORT_SYMBOL_GPL(ps3_vuart_port_driver_unregister);
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