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drm/linux-core/i810_dma.c

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/* i810_dma.c -- DMA support for the i810 -*- linux-c -*-
* Created: Mon Dec 13 01:50:01 1999 by jhartmann@precisioninsight.com
*
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors: Rickard E. (Rik) Faith <faith@precisioninsight.com>
* Jeff Hartmann <jhartmann@precisioninsight.com>
* Keith Whitwell <keithw@precisioninsight.com>
*
* $XFree86$
*
*/
#define __NO_VERSION__
#include "drmP.h"
#include "i810_drv.h"
#include <linux/interrupt.h> /* For task queue support */
#define I810_BUF_FREE 1
#define I810_BUF_USED 0
#define I810_REG(reg) 2
#define I810_BASE(reg) ((unsigned long) \
dev->maplist[I810_REG(reg)]->handle)
#define I810_ADDR(reg) (I810_BASE(reg) + reg)
#define I810_DEREF(reg) *(__volatile__ int *)I810_ADDR(reg)
#define I810_READ(reg) I810_DEREF(reg)
#define I810_WRITE(reg,val) do { I810_DEREF(reg) = val; } while (0)
#define I810_DEREF16(reg) *(__volatile__ u16 *)I810_ADDR(reg)
#define I810_READ16(reg) I810_DEREF16(reg)
#define I810_WRITE16(reg,val) do { I810_DEREF16(reg) = val; } while (0)
#define RING_LOCALS unsigned int outring, ringmask; volatile char *virt;
#define BEGIN_LP_RING(n) do { \
if (I810_VERBOSE) \
DRM_DEBUG("BEGIN_LP_RING(%d) in %s\n", \
n, __FUNCTION__); \
if (dev_priv->ring.space < n*4) \
i810_wait_ring(dev, n*4); \
dev_priv->ring.space -= n*4; \
outring = dev_priv->ring.tail; \
ringmask = dev_priv->ring.tail_mask; \
virt = dev_priv->ring.virtual_start; \
} while (0)
#define ADVANCE_LP_RING() do { \
if (I810_VERBOSE) DRM_DEBUG("ADVANCE_LP_RING\n"); \
dev_priv->ring.tail = outring; \
I810_WRITE(LP_RING + RING_TAIL, outring); \
} while(0)
#define OUT_RING(n) do { \
if (I810_VERBOSE) DRM_DEBUG(" OUT_RING %x\n", (int)(n)); \
*(volatile unsigned int *)(virt + outring) = n; \
outring += 4; \
outring &= ringmask; \
} while (0);
static inline void i810_print_status_page(drm_device_t *dev)
{
drm_device_dma_t *dma = dev->dma;
drm_i810_private_t *dev_priv = dev->dev_private;
u32 *temp = (u32 *)dev_priv->hw_status_page;
int i;
DRM_DEBUG( "hw_status: Interrupt Status : %x\n", temp[0]);
DRM_DEBUG( "hw_status: LpRing Head ptr : %x\n", temp[1]);
DRM_DEBUG( "hw_status: IRing Head ptr : %x\n", temp[2]);
DRM_DEBUG( "hw_status: Reserved : %x\n", temp[3]);
DRM_DEBUG( "hw_status: Driver Counter : %d\n", temp[5]);
for(i = 6; i < dma->buf_count + 6; i++) {
DRM_DEBUG( "buffer status idx : %d used: %d\n", i - 6, temp[i]);
}
}
static drm_buf_t *i810_freelist_get(drm_device_t *dev)
{
drm_device_dma_t *dma = dev->dma;
int i;
int used;
/* Linear search might not be the best solution */
for (i = 0; i < dma->buf_count; i++) {
drm_buf_t *buf = dma->buflist[ i ];
drm_i810_buf_priv_t *buf_priv = buf->dev_private;
/* In use is already a pointer */
used = cmpxchg(buf_priv->in_use, I810_BUF_FREE,
I810_BUF_USED);
if(used == I810_BUF_FREE) {
return buf;
}
}
return NULL;
}
/* This should only be called if the buffer is not sent to the hardware
* yet, the hardware updates in use for us once its on the ring buffer.
*/
static int i810_freelist_put(drm_device_t *dev, drm_buf_t *buf)
{
drm_i810_buf_priv_t *buf_priv = buf->dev_private;
int used;
/* In use is already a pointer */
used = cmpxchg(buf_priv->in_use, I810_BUF_USED, I810_BUF_FREE);
if(used != I810_BUF_USED) {
DRM_ERROR("Freeing buffer thats not in use : %d\n", buf->idx);
return -EINVAL;
}
return 0;
}
static int i810_dma_get_buffers(drm_device_t *dev, drm_dma_t *d)
{
int i;
drm_buf_t *buf;
for (i = d->granted_count; i < d->request_count; i++) {
buf = i810_freelist_get(dev);
if (!buf) break;
buf->pid = current->pid;
copy_to_user_ret(&d->request_indices[i],
&buf->idx,
sizeof(buf->idx),
-EFAULT);
copy_to_user_ret(&d->request_sizes[i],
&buf->total,
sizeof(buf->total),
-EFAULT);
++d->granted_count;
}
return 0;
}
static unsigned long i810_alloc_page(drm_device_t *dev)
{
unsigned long address;
address = __get_free_page(GFP_KERNEL);
if(address == 0UL)
return 0;
atomic_inc(&mem_map[MAP_NR((void *) address)].count);
set_bit(PG_locked, &mem_map[MAP_NR((void *) address)].flags);
return address;
}
static void i810_free_page(drm_device_t *dev, unsigned long page)
{
if(page == 0UL)
return;
atomic_dec(&mem_map[MAP_NR((void *) page)].count);
clear_bit(PG_locked, &mem_map[MAP_NR((void *) page)].flags);
wake_up(&mem_map[MAP_NR((void *) page)].wait);
free_page(page);
return;
}
static int i810_dma_cleanup(drm_device_t *dev)
{
if(dev->dev_private) {
drm_i810_private_t *dev_priv =
(drm_i810_private_t *) dev->dev_private;
if(dev_priv->ring.virtual_start) {
drm_ioremapfree((void *) dev_priv->ring.virtual_start,
dev_priv->ring.Size);
}
if(dev_priv->hw_status_page != 0UL) {
i810_free_page(dev, dev_priv->hw_status_page);
/* Need to rewrite hardware status page */
I810_WRITE(0x02080, 0x1ffff000);
}
drm_free(dev->dev_private, sizeof(drm_i810_private_t),
DRM_MEM_DRIVER);
dev->dev_private = NULL;
}
return 0;
}
static int i810_wait_ring(drm_device_t *dev, int n)
{
drm_i810_private_t *dev_priv = dev->dev_private;
drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
int iters = 0;
unsigned long end;
end = jiffies + (HZ*3);
while (ring->space < n) {
int i;
ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
ring->space = ring->head - (ring->tail+8);
if (ring->space < 0) ring->space += ring->Size;
iters++;
if((signed)(end - jiffies) <= 0) {
DRM_ERROR("space: %d wanted %d\n", ring->space, n);
DRM_ERROR("lockup\n");
goto out_wait_ring;
}
for (i = 0 ; i < 2000 ; i++) ;
}
out_wait_ring:
return iters;
}
static void i810_kernel_lost_context(drm_device_t *dev)
{
drm_i810_private_t *dev_priv = dev->dev_private;
drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
ring->tail = I810_READ(LP_RING + RING_TAIL);
ring->space = ring->head - (ring->tail+8);
if (ring->space < 0) ring->space += ring->Size;
}
static int i810_freelist_init(drm_device_t *dev)
{
drm_device_dma_t *dma = dev->dma;
drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
u8 *hw_status = (u8 *)dev_priv->hw_status_page;
int i;
int my_idx = 24;
if(dma->buf_count > 1019) {
/* Not enough space in the status page for the freelist */
return -EINVAL;
}
for (i = 0; i < dma->buf_count; i++) {
drm_buf_t *buf = dma->buflist[ i ];
drm_i810_buf_priv_t *buf_priv = buf->dev_private;
buf_priv->in_use = hw_status + my_idx;
DRM_DEBUG("buf_priv->in_use : %p\n", buf_priv->in_use);
*buf_priv->in_use = I810_BUF_FREE;
buf_priv->my_use_idx = my_idx;
my_idx += 4;
}
return 0;
}
static int i810_dma_initialize(drm_device_t *dev,
drm_i810_private_t *dev_priv,
drm_i810_init_t *init)
{
drm_map_t *sarea_map;
dev->dev_private = (void *) dev_priv;
memset(dev_priv, 0, sizeof(drm_i810_private_t));
if (init->ring_map_idx >= dev->map_count ||
init->buffer_map_idx >= dev->map_count) {
i810_dma_cleanup(dev);
DRM_ERROR("ring_map or buffer_map are invalid\n");
return -EINVAL;
}
dev_priv->ring_map_idx = init->ring_map_idx;
dev_priv->buffer_map_idx = init->buffer_map_idx;
sarea_map = dev->maplist[0];
dev_priv->sarea_priv = (drm_i810_sarea_t *)
((u8 *)sarea_map->handle +
init->sarea_priv_offset);
atomic_set(&dev_priv->flush_done, 0);
init_waitqueue_head(&dev_priv->flush_queue);
dev_priv->ring.Start = init->ring_start;
dev_priv->ring.End = init->ring_end;
dev_priv->ring.Size = init->ring_size;
dev_priv->ring.virtual_start = drm_ioremap(dev->agp->base +
init->ring_start,
init->ring_size);
dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
if (dev_priv->ring.virtual_start == NULL) {
i810_dma_cleanup(dev);
DRM_ERROR("can not ioremap virtual address for"
" ring buffer\n");
return -ENOMEM;
}
/* Program Hardware Status Page */
dev_priv->hw_status_page = i810_alloc_page(dev);
memset((void *) dev_priv->hw_status_page, 0, PAGE_SIZE);
if(dev_priv->hw_status_page == 0UL) {
i810_dma_cleanup(dev);
DRM_ERROR("Can not allocate hardware status page\n");
return -ENOMEM;
}
DRM_DEBUG("hw status page @ %lx\n", dev_priv->hw_status_page);
I810_WRITE(0x02080, virt_to_bus((void *)dev_priv->hw_status_page));
DRM_DEBUG("Enabled hardware status page\n");
/* Now we need to init our freelist */
if(i810_freelist_init(dev) != 0) {
i810_dma_cleanup(dev);
DRM_ERROR("Not enough space in the status page for"
" the freelist\n");
return -ENOMEM;
}
return 0;
}
int i810_dma_init(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_i810_private_t *dev_priv;
drm_i810_init_t init;
int retcode = 0;
copy_from_user_ret(&init, (drm_i810_init_t *)arg,
sizeof(init), -EFAULT);
switch(init.func) {
case I810_INIT_DMA:
dev_priv = drm_alloc(sizeof(drm_i810_private_t),
DRM_MEM_DRIVER);
if(dev_priv == NULL) return -ENOMEM;
retcode = i810_dma_initialize(dev, dev_priv, &init);
break;
case I810_CLEANUP_DMA:
retcode = i810_dma_cleanup(dev);
break;
default:
retcode = -EINVAL;
break;
}
return retcode;
}
static void i810_dma_dispatch_general(drm_device_t *dev, drm_buf_t *buf,
int used )
{
drm_i810_private_t *dev_priv = dev->dev_private;
drm_i810_buf_priv_t *buf_priv = buf->dev_private;
unsigned long address = (unsigned long)buf->bus_address;
unsigned long start = address - dev->agp->base;
RING_LOCALS;
dev_priv->counter++;
DRM_DEBUG( "dispatch counter : %ld\n", dev_priv->counter);
DRM_DEBUG( "i810_dma_dispatch\n");
DRM_DEBUG( "start : 0x%lx\n", start);
DRM_DEBUG( "used : 0x%x\n", used);
DRM_DEBUG( "start + used - 4 : 0x%lx\n", start + used - 4);
i810_kernel_lost_context(dev);
BEGIN_LP_RING(10);
OUT_RING( CMD_OP_BATCH_BUFFER );
OUT_RING( start | BB1_PROTECTED );
OUT_RING( start + used - 4 );
OUT_RING( CMD_STORE_DWORD_IDX );
OUT_RING( 20 );
OUT_RING( dev_priv->counter );
OUT_RING( CMD_STORE_DWORD_IDX );
OUT_RING( buf_priv->my_use_idx );
OUT_RING( I810_BUF_FREE );
OUT_RING( CMD_REPORT_HEAD );
ADVANCE_LP_RING();
}
static void i810_dma_dispatch_vertex(drm_device_t *dev,
drm_buf_t *buf,
int discard,
int used)
{
drm_i810_private_t *dev_priv = dev->dev_private;
drm_i810_buf_priv_t *buf_priv = buf->dev_private;
drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
drm_clip_rect_t *box = sarea_priv->boxes;
int nbox = sarea_priv->nbox;
unsigned long address = (unsigned long)buf->bus_address;
unsigned long start = address - dev->agp->base;
int i = 0;
RING_LOCALS;
if (nbox > I810_NR_SAREA_CLIPRECTS)
nbox = I810_NR_SAREA_CLIPRECTS;
DRM_DEBUG("dispatch vertex addr 0x%lx, used 0x%x nbox %d\n",
address, used, nbox);
dev_priv->counter++;
DRM_DEBUG( "dispatch counter : %ld\n", dev_priv->counter);
DRM_DEBUG( "i810_dma_dispatch\n");
DRM_DEBUG( "start : %lx\n", start);
DRM_DEBUG( "used : %d\n", used);
DRM_DEBUG( "start + used - 4 : %ld\n", start + used - 4);
i810_kernel_lost_context(dev);
if (used) {
do {
if (i < nbox) {
BEGIN_LP_RING(4);
OUT_RING( GFX_OP_SCISSOR | SC_UPDATE_SCISSOR |
SC_ENABLE );
OUT_RING( GFX_OP_SCISSOR_INFO );
OUT_RING( box[i].x1 | (box[i].y1 << 16) );
OUT_RING( (box[i].x2-1) | ((box[i].y2-1)<<16) );
ADVANCE_LP_RING();
}
BEGIN_LP_RING(4);
OUT_RING( CMD_OP_BATCH_BUFFER );
OUT_RING( start | BB1_PROTECTED );
OUT_RING( start + used - 4 );
OUT_RING( 0 );
ADVANCE_LP_RING();
} while (++i < nbox);
}
BEGIN_LP_RING(10);
OUT_RING( CMD_STORE_DWORD_IDX );
OUT_RING( 20 );
OUT_RING( dev_priv->counter );
OUT_RING( 0 );
if (discard) {
OUT_RING( CMD_STORE_DWORD_IDX );
OUT_RING( buf_priv->my_use_idx );
OUT_RING( I810_BUF_FREE );
OUT_RING( 0 );
}
OUT_RING( CMD_REPORT_HEAD );
OUT_RING( 0 );
ADVANCE_LP_RING();
}
/* Interrupts are only for flushing */
static void i810_dma_service(int irq, void *device, struct pt_regs *regs)
{
drm_device_t *dev = (drm_device_t *)device;
u16 temp;
atomic_inc(&dev->total_irq);
temp = I810_READ16(I810REG_INT_IDENTITY_R);
temp = temp & ~(0x6000);
if(temp != 0) I810_WRITE16(I810REG_INT_IDENTITY_R,
temp); /* Clear all interrupts */
queue_task(&dev->tq, &tq_immediate);
mark_bh(IMMEDIATE_BH);
}
static void i810_dma_task_queue(void *device)
{
drm_device_t *dev = (drm_device_t *) device;
drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
atomic_set(&dev_priv->flush_done, 1);
wake_up_interruptible(&dev_priv->flush_queue);
}
int i810_irq_install(drm_device_t *dev, int irq)
{
int retcode;
u16 temp;
if (!irq) return -EINVAL;
down(&dev->struct_sem);
if (dev->irq) {
up(&dev->struct_sem);
return -EBUSY;
}
dev->irq = irq;
up(&dev->struct_sem);
DRM_DEBUG( "Interrupt Install : %d\n", irq);
DRM_DEBUG("%d\n", irq);
dev->context_flag = 0;
dev->interrupt_flag = 0;
dev->dma_flag = 0;
dev->dma->next_buffer = NULL;
dev->dma->next_queue = NULL;
dev->dma->this_buffer = NULL;
dev->tq.next = NULL;
dev->tq.sync = 0;
dev->tq.routine = i810_dma_task_queue;
dev->tq.data = dev;
/* Before installing handler */
temp = I810_READ16(I810REG_HWSTAM);
temp = temp & 0x6000;
I810_WRITE16(I810REG_HWSTAM, temp);
temp = I810_READ16(I810REG_INT_MASK_R);
temp = temp & 0x6000;
I810_WRITE16(I810REG_INT_MASK_R, temp); /* Unmask interrupts */
temp = I810_READ16(I810REG_INT_ENABLE_R);
temp = temp & 0x6000;
I810_WRITE16(I810REG_INT_ENABLE_R, temp); /* Disable all interrupts */
/* Install handler */
if ((retcode = request_irq(dev->irq,
i810_dma_service,
0,
dev->devname,
dev))) {
down(&dev->struct_sem);
dev->irq = 0;
up(&dev->struct_sem);
return retcode;
}
temp = I810_READ16(I810REG_INT_ENABLE_R);
temp = temp & 0x6000;
temp = temp | 0x0003;
I810_WRITE16(I810REG_INT_ENABLE_R,
temp); /* Enable bp & user interrupts */
return 0;
}
int i810_irq_uninstall(drm_device_t *dev)
{
int irq;
u16 temp;
down(&dev->struct_sem);
irq = dev->irq;
dev->irq = 0;
up(&dev->struct_sem);
if (!irq) return -EINVAL;
DRM_DEBUG( "Interrupt UnInstall: %d\n", irq);
DRM_DEBUG("%d\n", irq);
temp = I810_READ16(I810REG_INT_IDENTITY_R);
temp = temp & ~(0x6000);
if(temp != 0) I810_WRITE16(I810REG_INT_IDENTITY_R,
temp); /* Clear all interrupts */
temp = I810_READ16(I810REG_INT_ENABLE_R);
temp = temp & 0x6000;
I810_WRITE16(I810REG_INT_ENABLE_R,
temp); /* Disable all interrupts */
free_irq(irq, dev);
return 0;
}
int i810_control(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_control_t ctl;
int retcode;
DRM_DEBUG( "i810_control\n");
copy_from_user_ret(&ctl, (drm_control_t *)arg, sizeof(ctl), -EFAULT);
switch (ctl.func) {
case DRM_INST_HANDLER:
if ((retcode = i810_irq_install(dev, ctl.irq)))
return retcode;
break;
case DRM_UNINST_HANDLER:
if ((retcode = i810_irq_uninstall(dev)))
return retcode;
break;
default:
return -EINVAL;
}
return 0;
}
static inline void i810_dma_emit_flush(drm_device_t *dev)
{
drm_i810_private_t *dev_priv = dev->dev_private;
RING_LOCALS;
i810_kernel_lost_context(dev);
BEGIN_LP_RING(2);
OUT_RING( CMD_REPORT_HEAD );
OUT_RING( GFX_OP_USER_INTERRUPT );
ADVANCE_LP_RING();
}
static inline void i810_dma_quiescent_emit(drm_device_t *dev)
{
drm_i810_private_t *dev_priv = dev->dev_private;
RING_LOCALS;
i810_kernel_lost_context(dev);
BEGIN_LP_RING(4);
OUT_RING( INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE );
OUT_RING( CMD_REPORT_HEAD );
OUT_RING( GFX_OP_USER_INTERRUPT );
OUT_RING( 0 );
ADVANCE_LP_RING();
}
static void i810_dma_quiescent(drm_device_t *dev)
{
DECLARE_WAITQUEUE(entry, current);
drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
unsigned long end;
if(dev_priv == NULL) {
return;
}
atomic_set(&dev_priv->flush_done, 0);
current->state = TASK_INTERRUPTIBLE;
add_wait_queue(&dev_priv->flush_queue, &entry);
end = jiffies + (HZ*3);
for (;;) {
i810_dma_quiescent_emit(dev);
if (atomic_read(&dev_priv->flush_done) == 1) break;
if((signed)(end - jiffies) <= 0) {
DRM_ERROR("lockup\n");
break;
}
schedule_timeout(HZ*3);
if (signal_pending(current)) {
break;
}
}
current->state = TASK_RUNNING;
remove_wait_queue(&dev_priv->flush_queue, &entry);
return;
}
static int i810_flush_queue(drm_device_t *dev)
{
DECLARE_WAITQUEUE(entry, current);
drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
unsigned long end;
int ret = 0;
if(dev_priv == NULL) {
return 0;
}
atomic_set(&dev_priv->flush_done, 0);
current->state = TASK_INTERRUPTIBLE;
add_wait_queue(&dev_priv->flush_queue, &entry);
end = jiffies + (HZ*3);
for (;;) {
i810_dma_emit_flush(dev);
if (atomic_read(&dev_priv->flush_done) == 1) break;
if((signed)(end - jiffies) <= 0) {
DRM_ERROR("lockup\n");
break;
}
schedule_timeout(HZ*3);
if (signal_pending(current)) {
ret = -EINTR; /* Can't restart */
break;
}
}
current->state = TASK_RUNNING;
remove_wait_queue(&dev_priv->flush_queue, &entry);
return ret;
}
/* Must be called with the lock held */
void i810_reclaim_buffers(drm_device_t *dev, pid_t pid)
{
drm_device_dma_t *dma = dev->dma;
int i;
if (!dma) return;
if(dev->dev_private == NULL) return;
if(dma->buflist == NULL) return;
i810_flush_queue(dev);
for (i = 0; i < dma->buf_count; i++) {
drm_buf_t *buf = dma->buflist[ i ];
drm_i810_buf_priv_t *buf_priv = buf->dev_private;
/* Only buffers that need to get reclaimed ever
* get set to free
*/
if (buf->pid == pid && buf_priv) {
cmpxchg(buf_priv->in_use,
I810_BUF_USED, I810_BUF_FREE);
}
}
}
int i810_lock(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
DECLARE_WAITQUEUE(entry, current);
int ret = 0;
drm_lock_t lock;
copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
if (lock.context == DRM_KERNEL_CONTEXT) {
DRM_ERROR("Process %d using kernel context %d\n",
current->pid, lock.context);
return -EINVAL;
}
DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
lock.context, current->pid, dev->lock.hw_lock->lock,
lock.flags);
if (lock.context < 0) {
return -EINVAL;
}
/* Only one queue:
*/
if (!ret) {
#if 0
if (_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)
!= lock.context) {
long j = jiffies - dev->lock.lock_time;
if (j > 0 && j <= DRM_LOCK_SLICE) {
/* Can't take lock if we just had it and
there is contention. */
current->state = TASK_INTERRUPTIBLE;
schedule_timeout(j);
}
}
#endif
add_wait_queue(&dev->lock.lock_queue, &entry);
for (;;) {
if (!dev->lock.hw_lock) {
/* Device has been unregistered */
ret = -EINTR;
break;
}
if (drm_lock_take(&dev->lock.hw_lock->lock,
lock.context)) {
dev->lock.pid = current->pid;
dev->lock.lock_time = jiffies;
atomic_inc(&dev->total_locks);
break; /* Got lock */
}
/* Contention */
atomic_inc(&dev->total_sleeps);
current->state = TASK_INTERRUPTIBLE;
DRM_DEBUG("Calling lock schedule\n");
schedule();
if (signal_pending(current)) {
ret = -ERESTARTSYS;
break;
}
}
current->state = TASK_RUNNING;
remove_wait_queue(&dev->lock.lock_queue, &entry);
}
if (!ret) {
if (lock.flags & _DRM_LOCK_QUIESCENT) {
DRM_DEBUG("_DRM_LOCK_QUIESCENT\n");
DRM_DEBUG("fred\n");
i810_dma_quiescent(dev);
}
}
DRM_DEBUG("%d %s\n", lock.context, ret ? "interrupted" : "has lock");
return ret;
}
int i810_flush_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
DRM_DEBUG("i810_flush_ioctl\n");
if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
DRM_ERROR("i810_flush_ioctl called without lock held\n");
return -EINVAL;
}
i810_flush_queue(dev);
return 0;
}
static int i810DmaGeneral(drm_device_t *dev, drm_i810_general_t *args)
{
drm_device_dma_t *dma = dev->dma;
drm_buf_t *buf = dma->buflist[ args->idx ];
if (!args->used) {
i810_freelist_put(dev, buf);
} else {
i810_dma_dispatch_general( dev, buf, args->used );
atomic_add(args->used, &dma->total_bytes);
atomic_inc(&dma->total_dmas);
}
return 0;
}
static int i810DmaVertex(drm_device_t *dev, drm_i810_vertex_t *args)
{
drm_device_dma_t *dma = dev->dma;
drm_buf_t *buf = dma->buflist[ args->idx ];
i810_dma_dispatch_vertex( dev, buf, args->discard, args->used );
atomic_add(args->used, &dma->total_bytes);
atomic_inc(&dma->total_dmas);
return 0;
}
int i810_dma_general(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_i810_general_t general;
drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
u32 *hw_status = (u32 *)dev_priv->hw_status_page;
drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
dev_priv->sarea_priv;
int retcode = 0;
copy_from_user_ret(&general, (drm_i810_general_t *)arg, sizeof(general),
-EFAULT);
DRM_DEBUG("i810 dma general idx %d used %d\n",
general.idx, general.used);
if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
DRM_ERROR("i810_dma_general called without lock held\n");
return -EINVAL;
}
retcode = i810DmaGeneral(dev, &general);
sarea_priv->last_enqueue = dev_priv->counter-1;
sarea_priv->last_dispatch = (int) hw_status[5];
return retcode;
}
int i810_dma_vertex(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
u32 *hw_status = (u32 *)dev_priv->hw_status_page;
drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
dev_priv->sarea_priv;
drm_i810_vertex_t vertex;
int retcode = 0;
copy_from_user_ret(&vertex, (drm_i810_vertex_t *)arg, sizeof(vertex),
-EFAULT);
if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
DRM_ERROR("i810_dma_vertex called without lock held\n");
return -EINVAL;
}
DRM_DEBUG("i810 dma vertex, idx %d used %d discard %d\n",
vertex.idx, vertex.used, vertex.discard);
retcode = i810DmaVertex(dev, &vertex);
sarea_priv->last_enqueue = dev_priv->counter-1;
sarea_priv->last_dispatch = (int) hw_status[5];
return retcode;
}
int i810_getage(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
u32 *hw_status = (u32 *)dev_priv->hw_status_page;
drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
dev_priv->sarea_priv;
sarea_priv->last_dispatch = (int) hw_status[5];
return 0;
}
int i810_dma(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_device_dma_t *dma = dev->dma;
int retcode = 0;
drm_dma_t d;
drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
u32 *hw_status = (u32 *)dev_priv->hw_status_page;
drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
dev_priv->sarea_priv;
copy_from_user_ret(&d, (drm_dma_t *)arg, sizeof(d), -EFAULT);
DRM_DEBUG("%d %d: %d send, %d req\n",
current->pid, d.context, d.send_count, d.request_count);
if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
DRM_ERROR("i810_dma called without lock held\n");
return -EINVAL;
}
/* Please don't send us buffers.
*/
if (d.send_count != 0) {
DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n",
current->pid, d.send_count);
return -EINVAL;
}
/* We'll send you buffers.
*/
if (d.request_count < 0 || d.request_count > dma->buf_count) {
DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
current->pid, d.request_count, dma->buf_count);
return -EINVAL;
}
d.granted_count = 0;
if (!retcode && d.request_count) {
retcode = i810_dma_get_buffers(dev, &d);
}
DRM_DEBUG("i810_dma: %d returning, granted = %d\n",
current->pid, d.granted_count);
copy_to_user_ret((drm_dma_t *)arg, &d, sizeof(d), -EFAULT);
sarea_priv->last_dispatch = (int) hw_status[5];
return retcode;
}
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