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kernel_samsung_sm7125/drivers/media/video/pvrusb2/pvrusb2-io.c

667 lines
18 KiB

/*
*
* $Id$
*
* Copyright (C) 2005 Mike Isely <isely@pobox.com>
*
* 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; either 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 "pvrusb2-io.h"
#include "pvrusb2-debug.h"
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/mutex.h>
static const char *pvr2_buffer_state_decode(enum pvr2_buffer_state);
#define BUFFER_SIG 0x47653271
// #define SANITY_CHECK_BUFFERS
#ifdef SANITY_CHECK_BUFFERS
#define BUFFER_CHECK(bp) do { \
if ((bp)->signature != BUFFER_SIG) { \
pvr2_trace(PVR2_TRACE_ERROR_LEGS, \
"Buffer %p is bad at %s:%d", \
(bp),__FILE__,__LINE__); \
pvr2_buffer_describe(bp,"BadSig"); \
BUG(); \
} \
} while (0)
#else
#define BUFFER_CHECK(bp) do {} while(0)
#endif
struct pvr2_stream {
/* Buffers queued for reading */
struct list_head queued_list;
unsigned int q_count;
unsigned int q_bcount;
/* Buffers with retrieved data */
struct list_head ready_list;
unsigned int r_count;
unsigned int r_bcount;
/* Buffers available for use */
struct list_head idle_list;
unsigned int i_count;
unsigned int i_bcount;
/* Pointers to all buffers */
struct pvr2_buffer **buffers;
/* Array size of buffers */
unsigned int buffer_slot_count;
/* Total buffers actually in circulation */
unsigned int buffer_total_count;
/* Designed number of buffers to be in circulation */
unsigned int buffer_target_count;
/* Executed when ready list become non-empty */
pvr2_stream_callback callback_func;
void *callback_data;
/* Context for transfer endpoint */
struct usb_device *dev;
int endpoint;
/* Overhead for mutex enforcement */
spinlock_t list_lock;
struct mutex mutex;
/* Tracking state for tolerating errors */
unsigned int fail_count;
unsigned int fail_tolerance;
};
struct pvr2_buffer {
int id;
int signature;
enum pvr2_buffer_state state;
void *ptr; /* Pointer to storage area */
unsigned int max_count; /* Size of storage area */
unsigned int used_count; /* Amount of valid data in storage area */
int status; /* Transfer result status */
struct pvr2_stream *stream;
struct list_head list_overhead;
struct urb *purb;
};
static const char *pvr2_buffer_state_decode(enum pvr2_buffer_state st)
{
switch (st) {
case pvr2_buffer_state_none: return "none";
case pvr2_buffer_state_idle: return "idle";
case pvr2_buffer_state_queued: return "queued";
case pvr2_buffer_state_ready: return "ready";
}
return "unknown";
}
#ifdef SANITY_CHECK_BUFFERS
static void pvr2_buffer_describe(struct pvr2_buffer *bp,const char *msg)
{
pvr2_trace(PVR2_TRACE_INFO,
"buffer%s%s %p state=%s id=%d status=%d"
" stream=%p purb=%p sig=0x%x",
(msg ? " " : ""),
(msg ? msg : ""),
bp,
(bp ? pvr2_buffer_state_decode(bp->state) : "(invalid)"),
(bp ? bp->id : 0),
(bp ? bp->status : 0),
(bp ? bp->stream : NULL),
(bp ? bp->purb : NULL),
(bp ? bp->signature : 0));
}
#endif /* SANITY_CHECK_BUFFERS */
static void pvr2_buffer_remove(struct pvr2_buffer *bp)
{
unsigned int *cnt;
unsigned int *bcnt;
unsigned int ccnt;
struct pvr2_stream *sp = bp->stream;
switch (bp->state) {
case pvr2_buffer_state_idle:
cnt = &sp->i_count;
bcnt = &sp->i_bcount;
ccnt = bp->max_count;
break;
case pvr2_buffer_state_queued:
cnt = &sp->q_count;
bcnt = &sp->q_bcount;
ccnt = bp->max_count;
break;
case pvr2_buffer_state_ready:
cnt = &sp->r_count;
bcnt = &sp->r_bcount;
ccnt = bp->used_count;
break;
default:
return;
}
list_del_init(&bp->list_overhead);
(*cnt)--;
(*bcnt) -= ccnt;
pvr2_trace(PVR2_TRACE_BUF_FLOW,
"/*---TRACE_FLOW---*/"
" bufferPool %8s dec cap=%07d cnt=%02d",
pvr2_buffer_state_decode(bp->state),*bcnt,*cnt);
bp->state = pvr2_buffer_state_none;
}
static void pvr2_buffer_set_none(struct pvr2_buffer *bp)
{
unsigned long irq_flags;
struct pvr2_stream *sp;
BUFFER_CHECK(bp);
sp = bp->stream;
pvr2_trace(PVR2_TRACE_BUF_FLOW,
"/*---TRACE_FLOW---*/ bufferState %p %6s --> %6s",
bp,
pvr2_buffer_state_decode(bp->state),
pvr2_buffer_state_decode(pvr2_buffer_state_none));
spin_lock_irqsave(&sp->list_lock,irq_flags);
pvr2_buffer_remove(bp);
spin_unlock_irqrestore(&sp->list_lock,irq_flags);
}
static int pvr2_buffer_set_ready(struct pvr2_buffer *bp)
{
int fl;
unsigned long irq_flags;
struct pvr2_stream *sp;
BUFFER_CHECK(bp);
sp = bp->stream;
pvr2_trace(PVR2_TRACE_BUF_FLOW,
"/*---TRACE_FLOW---*/ bufferState %p %6s --> %6s",
bp,
pvr2_buffer_state_decode(bp->state),
pvr2_buffer_state_decode(pvr2_buffer_state_ready));
spin_lock_irqsave(&sp->list_lock,irq_flags);
fl = (sp->r_count == 0);
pvr2_buffer_remove(bp);
list_add_tail(&bp->list_overhead,&sp->ready_list);
bp->state = pvr2_buffer_state_ready;
(sp->r_count)++;
sp->r_bcount += bp->used_count;
pvr2_trace(PVR2_TRACE_BUF_FLOW,
"/*---TRACE_FLOW---*/"
" bufferPool %8s inc cap=%07d cnt=%02d",
pvr2_buffer_state_decode(bp->state),
sp->r_bcount,sp->r_count);
spin_unlock_irqrestore(&sp->list_lock,irq_flags);
return fl;
}
static void pvr2_buffer_set_idle(struct pvr2_buffer *bp)
{
unsigned long irq_flags;
struct pvr2_stream *sp;
BUFFER_CHECK(bp);
sp = bp->stream;
pvr2_trace(PVR2_TRACE_BUF_FLOW,
"/*---TRACE_FLOW---*/ bufferState %p %6s --> %6s",
bp,
pvr2_buffer_state_decode(bp->state),
pvr2_buffer_state_decode(pvr2_buffer_state_idle));
spin_lock_irqsave(&sp->list_lock,irq_flags);
pvr2_buffer_remove(bp);
list_add_tail(&bp->list_overhead,&sp->idle_list);
bp->state = pvr2_buffer_state_idle;
(sp->i_count)++;
sp->i_bcount += bp->max_count;
pvr2_trace(PVR2_TRACE_BUF_FLOW,
"/*---TRACE_FLOW---*/"
" bufferPool %8s inc cap=%07d cnt=%02d",
pvr2_buffer_state_decode(bp->state),
sp->i_bcount,sp->i_count);
spin_unlock_irqrestore(&sp->list_lock,irq_flags);
}
static void pvr2_buffer_set_queued(struct pvr2_buffer *bp)
{
unsigned long irq_flags;
struct pvr2_stream *sp;
BUFFER_CHECK(bp);
sp = bp->stream;
pvr2_trace(PVR2_TRACE_BUF_FLOW,
"/*---TRACE_FLOW---*/ bufferState %p %6s --> %6s",
bp,
pvr2_buffer_state_decode(bp->state),
pvr2_buffer_state_decode(pvr2_buffer_state_queued));
spin_lock_irqsave(&sp->list_lock,irq_flags);
pvr2_buffer_remove(bp);
list_add_tail(&bp->list_overhead,&sp->queued_list);
bp->state = pvr2_buffer_state_queued;
(sp->q_count)++;
sp->q_bcount += bp->max_count;
pvr2_trace(PVR2_TRACE_BUF_FLOW,
"/*---TRACE_FLOW---*/"
" bufferPool %8s inc cap=%07d cnt=%02d",
pvr2_buffer_state_decode(bp->state),
sp->q_bcount,sp->q_count);
spin_unlock_irqrestore(&sp->list_lock,irq_flags);
}
static void pvr2_buffer_wipe(struct pvr2_buffer *bp)
{
if (bp->state == pvr2_buffer_state_queued) {
usb_kill_urb(bp->purb);
}
}
static int pvr2_buffer_init(struct pvr2_buffer *bp,
struct pvr2_stream *sp,
unsigned int id)
{
memset(bp,0,sizeof(*bp));
bp->signature = BUFFER_SIG;
bp->id = id;
pvr2_trace(PVR2_TRACE_BUF_POOL,
"/*---TRACE_FLOW---*/ bufferInit %p stream=%p",bp,sp);
bp->stream = sp;
bp->state = pvr2_buffer_state_none;
INIT_LIST_HEAD(&bp->list_overhead);
bp->purb = usb_alloc_urb(0,GFP_KERNEL);
if (! bp->purb) return -ENOMEM;
#ifdef SANITY_CHECK_BUFFERS
pvr2_buffer_describe(bp,"create");
#endif
return 0;
}
static void pvr2_buffer_done(struct pvr2_buffer *bp)
{
#ifdef SANITY_CHECK_BUFFERS
pvr2_buffer_describe(bp,"delete");
#endif
pvr2_buffer_wipe(bp);
pvr2_buffer_set_none(bp);
bp->signature = 0;
bp->stream = NULL;
usb_free_urb(bp->purb);
pvr2_trace(PVR2_TRACE_BUF_POOL,"/*---TRACE_FLOW---*/"
" bufferDone %p",bp);
}
static int pvr2_stream_buffer_count(struct pvr2_stream *sp,unsigned int cnt)
{
int ret;
unsigned int scnt;
/* Allocate buffers pointer array in multiples of 32 entries */
if (cnt == sp->buffer_total_count) return 0;
pvr2_trace(PVR2_TRACE_BUF_POOL,
"/*---TRACE_FLOW---*/ poolResize "
" stream=%p cur=%d adj=%+d",
sp,
sp->buffer_total_count,
cnt-sp->buffer_total_count);
scnt = cnt & ~0x1f;
if (cnt > scnt) scnt += 0x20;
if (cnt > sp->buffer_total_count) {
if (scnt > sp->buffer_slot_count) {
struct pvr2_buffer **nb;
nb = kmalloc(scnt * sizeof(*nb),GFP_KERNEL);
if (!nb) return -ENOMEM;
if (sp->buffer_slot_count) {
memcpy(nb,sp->buffers,
sp->buffer_slot_count * sizeof(*nb));
kfree(sp->buffers);
}
sp->buffers = nb;
sp->buffer_slot_count = scnt;
}
while (sp->buffer_total_count < cnt) {
struct pvr2_buffer *bp;
bp = kmalloc(sizeof(*bp),GFP_KERNEL);
if (!bp) return -ENOMEM;
ret = pvr2_buffer_init(bp,sp,sp->buffer_total_count);
if (ret) {
kfree(bp);
return -ENOMEM;
}
sp->buffers[sp->buffer_total_count] = bp;
(sp->buffer_total_count)++;
pvr2_buffer_set_idle(bp);
}
} else {
while (sp->buffer_total_count > cnt) {
struct pvr2_buffer *bp;
bp = sp->buffers[sp->buffer_total_count - 1];
/* Paranoia */
sp->buffers[sp->buffer_total_count - 1] = NULL;
(sp->buffer_total_count)--;
pvr2_buffer_done(bp);
kfree(bp);
}
if (scnt < sp->buffer_slot_count) {
struct pvr2_buffer **nb = NULL;
if (scnt) {
nb = kmalloc(scnt * sizeof(*nb),GFP_KERNEL);
if (!nb) return -ENOMEM;
memcpy(nb,sp->buffers,scnt * sizeof(*nb));
}
kfree(sp->buffers);
sp->buffers = nb;
sp->buffer_slot_count = scnt;
}
}
return 0;
}
static int pvr2_stream_achieve_buffer_count(struct pvr2_stream *sp)
{
struct pvr2_buffer *bp;
unsigned int cnt;
if (sp->buffer_total_count == sp->buffer_target_count) return 0;
pvr2_trace(PVR2_TRACE_BUF_POOL,
"/*---TRACE_FLOW---*/"
" poolCheck stream=%p cur=%d tgt=%d",
sp,sp->buffer_total_count,sp->buffer_target_count);
if (sp->buffer_total_count < sp->buffer_target_count) {
return pvr2_stream_buffer_count(sp,sp->buffer_target_count);
}
cnt = 0;
while ((sp->buffer_total_count - cnt) > sp->buffer_target_count) {
bp = sp->buffers[sp->buffer_total_count - (cnt + 1)];
if (bp->state != pvr2_buffer_state_idle) break;
cnt++;
}
if (cnt) {
pvr2_stream_buffer_count(sp,sp->buffer_total_count - cnt);
}
return 0;
}
static void pvr2_stream_internal_flush(struct pvr2_stream *sp)
{
struct list_head *lp;
struct pvr2_buffer *bp1;
while ((lp = sp->queued_list.next) != &sp->queued_list) {
bp1 = list_entry(lp,struct pvr2_buffer,list_overhead);
pvr2_buffer_wipe(bp1);
/* At this point, we should be guaranteed that no
completion callback may happen on this buffer. But it's
possible that it might have completed after we noticed
it but before we wiped it. So double check its status
here first. */
if (bp1->state != pvr2_buffer_state_queued) continue;
pvr2_buffer_set_idle(bp1);
}
if (sp->buffer_total_count != sp->buffer_target_count) {
pvr2_stream_achieve_buffer_count(sp);
}
}
static void pvr2_stream_init(struct pvr2_stream *sp)
{
spin_lock_init(&sp->list_lock);
mutex_init(&sp->mutex);
INIT_LIST_HEAD(&sp->queued_list);
INIT_LIST_HEAD(&sp->ready_list);
INIT_LIST_HEAD(&sp->idle_list);
}
static void pvr2_stream_done(struct pvr2_stream *sp)
{
mutex_lock(&sp->mutex); do {
pvr2_stream_internal_flush(sp);
pvr2_stream_buffer_count(sp,0);
} while (0); mutex_unlock(&sp->mutex);
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
18 years ago
static void buffer_complete(struct urb *urb)
{
struct pvr2_buffer *bp = urb->context;
struct pvr2_stream *sp;
unsigned long irq_flags;
BUFFER_CHECK(bp);
sp = bp->stream;
bp->used_count = 0;
bp->status = 0;
pvr2_trace(PVR2_TRACE_BUF_FLOW,
"/*---TRACE_FLOW---*/ bufferComplete %p stat=%d cnt=%d",
bp,urb->status,urb->actual_length);
spin_lock_irqsave(&sp->list_lock,irq_flags);
if ((!(urb->status)) ||
(urb->status == -ENOENT) ||
(urb->status == -ECONNRESET) ||
(urb->status == -ESHUTDOWN)) {
bp->used_count = urb->actual_length;
if (sp->fail_count) {
pvr2_trace(PVR2_TRACE_TOLERANCE,
"stream %p transfer ok"
" - fail count reset",sp);
sp->fail_count = 0;
}
} else if (sp->fail_count < sp->fail_tolerance) {
// We can tolerate this error, because we're below the
// threshold...
(sp->fail_count)++;
pvr2_trace(PVR2_TRACE_TOLERANCE,
"stream %p ignoring error %d"
" - fail count increased to %u",
sp,urb->status,sp->fail_count);
} else {
bp->status = urb->status;
}
spin_unlock_irqrestore(&sp->list_lock,irq_flags);
pvr2_buffer_set_ready(bp);
if (sp && sp->callback_func) {
sp->callback_func(sp->callback_data);
}
}
struct pvr2_stream *pvr2_stream_create(void)
{
struct pvr2_stream *sp;
sp = kzalloc(sizeof(*sp),GFP_KERNEL);
if (!sp) return sp;
pvr2_trace(PVR2_TRACE_INIT,"pvr2_stream_create: sp=%p",sp);
pvr2_stream_init(sp);
return sp;
}
void pvr2_stream_destroy(struct pvr2_stream *sp)
{
if (!sp) return;
pvr2_trace(PVR2_TRACE_INIT,"pvr2_stream_destroy: sp=%p",sp);
pvr2_stream_done(sp);
kfree(sp);
}
void pvr2_stream_setup(struct pvr2_stream *sp,
struct usb_device *dev,
int endpoint,
unsigned int tolerance)
{
mutex_lock(&sp->mutex); do {
pvr2_stream_internal_flush(sp);
sp->dev = dev;
sp->endpoint = endpoint;
sp->fail_tolerance = tolerance;
} while(0); mutex_unlock(&sp->mutex);
}
void pvr2_stream_set_callback(struct pvr2_stream *sp,
pvr2_stream_callback func,
void *data)
{
unsigned long irq_flags;
mutex_lock(&sp->mutex); do {
spin_lock_irqsave(&sp->list_lock,irq_flags);
sp->callback_data = data;
sp->callback_func = func;
spin_unlock_irqrestore(&sp->list_lock,irq_flags);
} while(0); mutex_unlock(&sp->mutex);
}
/* Query / set the nominal buffer count */
int pvr2_stream_get_buffer_count(struct pvr2_stream *sp)
{
return sp->buffer_target_count;
}
int pvr2_stream_set_buffer_count(struct pvr2_stream *sp,unsigned int cnt)
{
int ret;
if (sp->buffer_target_count == cnt) return 0;
mutex_lock(&sp->mutex); do {
sp->buffer_target_count = cnt;
ret = pvr2_stream_achieve_buffer_count(sp);
} while(0); mutex_unlock(&sp->mutex);
return ret;
}
struct pvr2_buffer *pvr2_stream_get_idle_buffer(struct pvr2_stream *sp)
{
struct list_head *lp = sp->idle_list.next;
if (lp == &sp->idle_list) return NULL;
return list_entry(lp,struct pvr2_buffer,list_overhead);
}
struct pvr2_buffer *pvr2_stream_get_ready_buffer(struct pvr2_stream *sp)
{
struct list_head *lp = sp->ready_list.next;
if (lp == &sp->ready_list) return NULL;
return list_entry(lp,struct pvr2_buffer,list_overhead);
}
struct pvr2_buffer *pvr2_stream_get_buffer(struct pvr2_stream *sp,int id)
{
if (id < 0) return NULL;
if (id >= sp->buffer_total_count) return NULL;
return sp->buffers[id];
}
int pvr2_stream_get_ready_count(struct pvr2_stream *sp)
{
return sp->r_count;
}
void pvr2_stream_kill(struct pvr2_stream *sp)
{
struct pvr2_buffer *bp;
mutex_lock(&sp->mutex); do {
pvr2_stream_internal_flush(sp);
while ((bp = pvr2_stream_get_ready_buffer(sp)) != 0) {
pvr2_buffer_set_idle(bp);
}
if (sp->buffer_total_count != sp->buffer_target_count) {
pvr2_stream_achieve_buffer_count(sp);
}
} while(0); mutex_unlock(&sp->mutex);
}
int pvr2_buffer_queue(struct pvr2_buffer *bp)
{
#undef SEED_BUFFER
#ifdef SEED_BUFFER
unsigned int idx;
unsigned int val;
#endif
int ret = 0;
struct pvr2_stream *sp;
if (!bp) return -EINVAL;
sp = bp->stream;
mutex_lock(&sp->mutex); do {
pvr2_buffer_wipe(bp);
if (!sp->dev) {
ret = -EIO;
break;
}
pvr2_buffer_set_queued(bp);
#ifdef SEED_BUFFER
for (idx = 0; idx < (bp->max_count) / 4; idx++) {
val = bp->id << 24;
val |= idx;
((unsigned int *)(bp->ptr))[idx] = val;
}
#endif
bp->status = -EINPROGRESS;
usb_fill_bulk_urb(bp->purb, // struct urb *urb
sp->dev, // struct usb_device *dev
// endpoint (below)
usb_rcvbulkpipe(sp->dev,sp->endpoint),
bp->ptr, // void *transfer_buffer
bp->max_count, // int buffer_length
buffer_complete,
bp);
usb_submit_urb(bp->purb,GFP_KERNEL);
} while(0); mutex_unlock(&sp->mutex);
return ret;
}
int pvr2_buffer_set_buffer(struct pvr2_buffer *bp,void *ptr,unsigned int cnt)
{
int ret = 0;
unsigned long irq_flags;
struct pvr2_stream *sp;
if (!bp) return -EINVAL;
sp = bp->stream;
mutex_lock(&sp->mutex); do {
spin_lock_irqsave(&sp->list_lock,irq_flags);
if (bp->state != pvr2_buffer_state_idle) {
ret = -EPERM;
} else {
bp->ptr = ptr;
bp->stream->i_bcount -= bp->max_count;
bp->max_count = cnt;
bp->stream->i_bcount += bp->max_count;
pvr2_trace(PVR2_TRACE_BUF_FLOW,
"/*---TRACE_FLOW---*/ bufferPool "
" %8s cap cap=%07d cnt=%02d",
pvr2_buffer_state_decode(
pvr2_buffer_state_idle),
bp->stream->i_bcount,bp->stream->i_count);
}
spin_unlock_irqrestore(&sp->list_lock,irq_flags);
} while(0); mutex_unlock(&sp->mutex);
return ret;
}
unsigned int pvr2_buffer_get_count(struct pvr2_buffer *bp)
{
return bp->used_count;
}
int pvr2_buffer_get_status(struct pvr2_buffer *bp)
{
return bp->status;
}
int pvr2_buffer_get_id(struct pvr2_buffer *bp)
{
return bp->id;
}
/*
Stuff for Emacs to see, in order to encourage consistent editing style:
*** Local Variables: ***
*** mode: c ***
*** fill-column: 75 ***
*** tab-width: 8 ***
*** c-basic-offset: 8 ***
*** End: ***
*/