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drm/linux/i830_dma.c

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/* i830_dma.c -- DMA support for the I830 -*- linux-c -*-
* Created: Mon Dec 13 01:50:01 1999 by jhartmann@precisioninsight.com
*
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* 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@valinux.com>
* Jeff Hartmann <jhartmann@valinux.com>
* Keith Whitwell <keithw@valinux.com>
* Abraham vd Merwe <abraham@2d3d.co.za>
*
*/
#define __NO_VERSION__
#include "i830.h"
#include "drmP.h"
#include "i830_drv.h"
#include <linux/interrupt.h> /* For task queue support */
/* in case we don't have a 2.3.99-pre6 kernel or later: */
#ifndef VM_DONTCOPY
#define VM_DONTCOPY 0
#endif
#define I830_BUF_FREE 2
#define I830_BUF_CLIENT 1
#define I830_BUF_HARDWARE 0
#define I830_BUF_UNMAPPED 0
#define I830_BUF_MAPPED 1
#define RING_LOCALS unsigned int outring, ringmask; volatile char *virt;
#define DO_IDLE_WORKAROUND() \
do { \
int _head; \
int _tail; \
int _i; \
do { \
_head = I830_READ(LP_RING + RING_HEAD) & HEAD_ADDR; \
_tail = I830_READ(LP_RING + RING_TAIL) & TAIL_ADDR; \
for(_i = 0; _i < 65535; _i++); \
} while(_head != _tail); \
} while(0)
#define I830_SYNC_WORKAROUND 0
#define BEGIN_LP_RING(n) do { \
if (I830_VERBOSE) \
DRM_DEBUG("BEGIN_LP_RING(%d) in %s\n", \
n, __FUNCTION__); \
if (I830_SYNC_WORKAROUND) \
DO_IDLE_WORKAROUND(); \
if (dev_priv->ring.space < n*4) \
i830_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 (I830_VERBOSE) DRM_DEBUG("ADVANCE_LP_RING\n"); \
dev_priv->ring.tail = outring; \
I830_WRITE(LP_RING + RING_TAIL, outring); \
} while(0)
#define OUT_RING(n) do { \
if (I830_VERBOSE) DRM_DEBUG(" OUT_RING %x\n", (int)(n)); \
*(volatile unsigned int *)(virt + outring) = n; \
outring += 4; \
outring &= ringmask; \
} while (0);
static inline void i830_print_status_page(drm_device_t *dev)
{
drm_device_dma_t *dma = dev->dma;
drm_i830_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 = 9; i < dma->buf_count + 9; i++) {
DRM_DEBUG( "buffer status idx : %d used: %d\n", i - 9, temp[i]);
}
}
static drm_buf_t *i830_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_i830_buf_priv_t *buf_priv = buf->dev_private;
/* In use is already a pointer */
used = cmpxchg(buf_priv->in_use, I830_BUF_FREE,
I830_BUF_CLIENT);
if(used == I830_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 i830_freelist_put(drm_device_t *dev, drm_buf_t *buf)
{
drm_i830_buf_priv_t *buf_priv = buf->dev_private;
int used;
/* In use is already a pointer */
used = cmpxchg(buf_priv->in_use, I830_BUF_CLIENT, I830_BUF_FREE);
if(used != I830_BUF_CLIENT) {
DRM_ERROR("Freeing buffer thats not in use : %d\n", buf->idx);
return -EINVAL;
}
return 0;
}
static struct file_operations i830_buffer_fops = {
open: DRM(open),
flush: DRM(flush),
release: DRM(release),
ioctl: DRM(ioctl),
mmap: i830_mmap_buffers,
read: DRM(read),
fasync: DRM(fasync),
poll: DRM(poll),
};
int i830_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev;
drm_i830_private_t *dev_priv;
drm_buf_t *buf;
drm_i830_buf_priv_t *buf_priv;
lock_kernel();
dev = priv->dev;
dev_priv = dev->dev_private;
buf = dev_priv->mmap_buffer;
buf_priv = buf->dev_private;
vma->vm_flags |= (VM_IO | VM_DONTCOPY);
vma->vm_file = filp;
buf_priv->currently_mapped = I830_BUF_MAPPED;
unlock_kernel();
if (remap_page_range(vma->vm_start,
VM_OFFSET(vma),
vma->vm_end - vma->vm_start,
vma->vm_page_prot)) return -EAGAIN;
return 0;
}
static int i830_map_buffer(drm_buf_t *buf, struct file *filp)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_i830_buf_priv_t *buf_priv = buf->dev_private;
drm_i830_private_t *dev_priv = dev->dev_private;
struct file_operations *old_fops;
int retcode = 0;
if(buf_priv->currently_mapped == I830_BUF_MAPPED) return -EINVAL;
if(VM_DONTCOPY != 0) {
#if LINUX_VERSION_CODE <= 0x020402
down( &current->mm->mmap_sem );
#else
down_write( &current->mm->mmap_sem );
#endif
old_fops = filp->f_op;
filp->f_op = &i830_buffer_fops;
dev_priv->mmap_buffer = buf;
buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total,
PROT_READ|PROT_WRITE,
MAP_SHARED,
buf->bus_address);
dev_priv->mmap_buffer = NULL;
filp->f_op = old_fops;
if ((unsigned long)buf_priv->virtual > -1024UL) {
/* Real error */
DRM_DEBUG("mmap error\n");
retcode = (signed int)buf_priv->virtual;
buf_priv->virtual = 0;
}
#if LINUX_VERSION_CODE <= 0x020402
up( &current->mm->mmap_sem );
#else
up_write( &current->mm->mmap_sem );
#endif
} else {
buf_priv->virtual = buf_priv->kernel_virtual;
buf_priv->currently_mapped = I830_BUF_MAPPED;
}
return retcode;
}
static int i830_unmap_buffer(drm_buf_t *buf)
{
drm_i830_buf_priv_t *buf_priv = buf->dev_private;
int retcode = 0;
if(VM_DONTCOPY != 0) {
if(buf_priv->currently_mapped != I830_BUF_MAPPED)
return -EINVAL;
#if LINUX_VERSION_CODE <= 0x020402
down( &current->mm->mmap_sem );
#else
down_write( &current->mm->mmap_sem );
#endif
#if LINUX_VERSION_CODE < 0x020399
retcode = do_munmap((unsigned long)buf_priv->virtual,
(size_t) buf->total);
#else
retcode = do_munmap(current->mm,
(unsigned long)buf_priv->virtual,
(size_t) buf->total);
#endif
#if LINUX_VERSION_CODE <= 0x020402
up( &current->mm->mmap_sem );
#else
up_write( &current->mm->mmap_sem );
#endif
}
buf_priv->currently_mapped = I830_BUF_UNMAPPED;
buf_priv->virtual = 0;
return retcode;
}
static int i830_dma_get_buffer(drm_device_t *dev, drm_i830_dma_t *d,
struct file *filp)
{
drm_file_t *priv = filp->private_data;
drm_buf_t *buf;
drm_i830_buf_priv_t *buf_priv;
int retcode = 0;
buf = i830_freelist_get(dev);
if (!buf) {
retcode = -ENOMEM;
DRM_DEBUG("retcode=%d\n", retcode);
return retcode;
}
retcode = i830_map_buffer(buf, filp);
if(retcode) {
i830_freelist_put(dev, buf);
DRM_DEBUG("mapbuf failed, retcode %d\n", retcode);
return retcode;
}
buf->pid = priv->pid;
buf_priv = buf->dev_private;
d->granted = 1;
d->request_idx = buf->idx;
d->request_size = buf->total;
d->virtual = buf_priv->virtual;
return retcode;
}
static unsigned long i830_alloc_page(drm_device_t *dev)
{
unsigned long address;
address = __get_free_page(GFP_KERNEL);
if(address == 0UL)
return 0;
atomic_inc(&virt_to_page(address)->count);
set_bit(PG_locked, &virt_to_page(address)->flags);
return address;
}
static void i830_free_page(drm_device_t *dev, unsigned long page)
{
if(page == 0UL)
return;
atomic_dec(&virt_to_page(page)->count);
clear_bit(PG_locked, &virt_to_page(page)->flags);
wake_up(&virt_to_page(page)->wait);
free_page(page);
return;
}
static int i830_dma_cleanup(drm_device_t *dev)
{
drm_device_dma_t *dma = dev->dma;
if(dev->dev_private) {
int i;
drm_i830_private_t *dev_priv =
(drm_i830_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) {
i830_free_page(dev, dev_priv->hw_status_page);
/* Need to rewrite hardware status page */
I830_WRITE(0x02080, 0x1ffff000);
}
DRM(free)(dev->dev_private, sizeof(drm_i830_private_t),
DRM_MEM_DRIVER);
dev->dev_private = NULL;
for (i = 0; i < dma->buf_count; i++) {
drm_buf_t *buf = dma->buflist[ i ];
drm_i830_buf_priv_t *buf_priv = buf->dev_private;
DRM(ioremapfree)(buf_priv->kernel_virtual, buf->total);
}
}
return 0;
}
static int i830_wait_ring(drm_device_t *dev, int n)
{
drm_i830_private_t *dev_priv = dev->dev_private;
drm_i830_ring_buffer_t *ring = &(dev_priv->ring);
int iters = 0;
unsigned long end;
unsigned int last_head = I830_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
end = jiffies + (HZ*3);
while (ring->space < n) {
int i;
ring->head = I830_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
ring->space = ring->head - (ring->tail+8);
if (ring->space < 0) ring->space += ring->Size;
if (ring->head != last_head) {
end = jiffies + (HZ*3);
last_head = ring->head;
}
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 i830_kernel_lost_context(drm_device_t *dev)
{
drm_i830_private_t *dev_priv = dev->dev_private;
drm_i830_ring_buffer_t *ring = &(dev_priv->ring);
ring->head = I830_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
ring->tail = I830_READ(LP_RING + RING_TAIL);
ring->space = ring->head - (ring->tail+8);
if (ring->space < 0) ring->space += ring->Size;
}
static int i830_freelist_init(drm_device_t *dev, drm_i830_private_t *dev_priv)
{
drm_device_dma_t *dma = dev->dma;
int my_idx = 36;
u32 *hw_status = (u32 *)(dev_priv->hw_status_page + my_idx);
int i;
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_i830_buf_priv_t *buf_priv = buf->dev_private;
buf_priv->in_use = hw_status++;
buf_priv->my_use_idx = my_idx;
my_idx += 4;
*buf_priv->in_use = I830_BUF_FREE;
buf_priv->kernel_virtual = DRM(ioremap)(buf->bus_address,
buf->total);
}
return 0;
}
static int i830_dma_initialize(drm_device_t *dev,
drm_i830_private_t *dev_priv,
drm_i830_init_t *init)
{
struct list_head *list;
memset(dev_priv, 0, sizeof(drm_i830_private_t));
list_for_each(list, &dev->maplist->head) {
drm_map_list_t *r_list = (drm_map_list_t *)list;
if( r_list->map &&
r_list->map->type == _DRM_SHM &&
r_list->map->flags & _DRM_CONTAINS_LOCK ) {
dev_priv->sarea_map = r_list->map;
break;
}
}
if(!dev_priv->sarea_map) {
dev->dev_private = (void *)dev_priv;
i830_dma_cleanup(dev);
DRM_ERROR("can not find sarea!\n");
return -EINVAL;
}
DRM_FIND_MAP( dev_priv->mmio_map, init->mmio_offset );
if(!dev_priv->mmio_map) {
dev->dev_private = (void *)dev_priv;
i830_dma_cleanup(dev);
DRM_ERROR("can not find mmio map!\n");
return -EINVAL;
}
DRM_FIND_MAP( dev_priv->buffer_map, init->buffers_offset );
if(!dev_priv->buffer_map) {
dev->dev_private = (void *)dev_priv;
i830_dma_cleanup(dev);
DRM_ERROR("can not find dma buffer map!\n");
return -EINVAL;
}
dev_priv->sarea_priv = (drm_i830_sarea_t *)
((u8 *)dev_priv->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);
if (dev_priv->ring.virtual_start == NULL) {
dev->dev_private = (void *) dev_priv;
i830_dma_cleanup(dev);
DRM_ERROR("can not ioremap virtual address for"
" ring buffer\n");
return -ENOMEM;
}
dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
dev_priv->w = init->w;
dev_priv->h = init->h;
dev_priv->pitch = init->pitch;
dev_priv->back_offset = init->back_offset;
dev_priv->depth_offset = init->depth_offset;
dev_priv->front_di1 = init->front_offset | init->pitch_bits;
dev_priv->back_di1 = init->back_offset | init->pitch_bits;
dev_priv->zi1 = init->depth_offset | init->pitch_bits;
dev_priv->cpp = init->cpp;
/* We are using seperate values as placeholders for mechanisms for
* private backbuffer/depthbuffer usage.
*/
dev_priv->back_pitch = init->back_pitch;
dev_priv->depth_pitch = init->depth_pitch;
/* Program Hardware Status Page */
dev_priv->hw_status_page = i830_alloc_page(dev);
if(dev_priv->hw_status_page == 0UL) {
dev->dev_private = (void *)dev_priv;
i830_dma_cleanup(dev);
DRM_ERROR("Can not allocate hardware status page\n");
return -ENOMEM;
}
memset((void *) dev_priv->hw_status_page, 0, PAGE_SIZE);
DRM_DEBUG("hw status page @ %lx\n", dev_priv->hw_status_page);
I830_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(i830_freelist_init(dev, dev_priv) != 0) {
dev->dev_private = (void *)dev_priv;
i830_dma_cleanup(dev);
DRM_ERROR("Not enough space in the status page for"
" the freelist\n");
return -ENOMEM;
}
dev->dev_private = (void *)dev_priv;
return 0;
}
int i830_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_i830_private_t *dev_priv;
drm_i830_init_t init;
int retcode = 0;
if (copy_from_user(&init, (drm_i830_init_t *)arg, sizeof(init)))
return -EFAULT;
switch(init.func) {
case I830_INIT_DMA:
dev_priv = DRM(alloc)(sizeof(drm_i830_private_t),
DRM_MEM_DRIVER);
if(dev_priv == NULL) return -ENOMEM;
retcode = i830_dma_initialize(dev, dev_priv, &init);
break;
case I830_CLEANUP_DMA:
retcode = i830_dma_cleanup(dev);
break;
default:
retcode = -EINVAL;
break;
}
return retcode;
}
/* Most efficient way to verify state for the i830 is as it is
* emitted. Non-conformant state is silently dropped.
*
* Use 'volatile' & local var tmp to force the emitted values to be
* identical to the verified ones.
*/
static void i830EmitContextVerified( drm_device_t *dev,
volatile unsigned int *code )
{
drm_i830_private_t *dev_priv = dev->dev_private;
int i, j = 0;
unsigned int tmp;
RING_LOCALS;
BEGIN_LP_RING( I830_CTX_SETUP_SIZE );
for ( i = 0 ; i < I830_CTX_SETUP_SIZE ; i++ ) {
tmp = code[i];
#if 0
if ((tmp & (7<<29)) == (3<<29) &&
(tmp & (0x1f<<24)) < (0x1d<<24)) {
OUT_RING( tmp );
j++;
} else {
printk("Skipping %d\n", i);
}
#else
OUT_RING( tmp );
j++;
#endif
}
if (j & 1)
OUT_RING( 0 );
ADVANCE_LP_RING();
}
static void i830EmitTexVerified( drm_device_t *dev,
volatile unsigned int *code )
{
drm_i830_private_t *dev_priv = dev->dev_private;
int i, j = 0;
unsigned int tmp;
RING_LOCALS;
BEGIN_LP_RING( I830_TEX_SETUP_SIZE );
OUT_RING( GFX_OP_MAP_INFO );
OUT_RING( code[I830_TEXREG_MI1] );
OUT_RING( code[I830_TEXREG_MI2] );
OUT_RING( code[I830_TEXREG_MI3] );
OUT_RING( code[I830_TEXREG_MI4] );
OUT_RING( code[I830_TEXREG_MI5] );
for ( i = 6 ; i < I830_TEX_SETUP_SIZE ; i++ ) {
tmp = code[i];
OUT_RING( tmp );
j++;
}
if (j & 1)
OUT_RING( 0 );
ADVANCE_LP_RING();
}
static void i830EmitTexBlendVerified( drm_device_t *dev,
volatile unsigned int *code,
volatile unsigned int num)
{
drm_i830_private_t *dev_priv = dev->dev_private;
int i, j = 0;
unsigned int tmp;
RING_LOCALS;
BEGIN_LP_RING( num );
for ( i = 0 ; i < num ; i++ ) {
tmp = code[i];
OUT_RING( tmp );
j++;
}
if (j & 1)
OUT_RING( 0 );
ADVANCE_LP_RING();
}
static void i830EmitTexPalette( drm_device_t *dev,
unsigned int *palette,
int number,
int is_shared )
{
drm_i830_private_t *dev_priv = dev->dev_private;
int i;
RING_LOCALS;
BEGIN_LP_RING( 258 );
if(is_shared == 1) {
OUT_RING(CMD_OP_MAP_PALETTE_LOAD |
MAP_PALETTE_NUM(0) |
MAP_PALETTE_BOTH);
} else {
OUT_RING(CMD_OP_MAP_PALETTE_LOAD | MAP_PALETTE_NUM(number));
}
for(i = 0; i < 256; i++) {
OUT_RING(palette[i]);
}
OUT_RING(0);
}
/* Need to do some additional checking when setting the dest buffer.
*/
static void i830EmitDestVerified( drm_device_t *dev,
volatile unsigned int *code )
{
drm_i830_private_t *dev_priv = dev->dev_private;
unsigned int tmp;
RING_LOCALS;
BEGIN_LP_RING( I830_DEST_SETUP_SIZE + 6 );
tmp = code[I830_DESTREG_CBUFADDR];
if (tmp == dev_priv->front_di1) {
/* Don't use fence when front buffer rendering */
OUT_RING( CMD_OP_DESTBUFFER_INFO );
OUT_RING( BUF_3D_ID_COLOR_BACK |
BUF_3D_PITCH(dev_priv->back_pitch * dev_priv->cpp) );
OUT_RING( tmp );
OUT_RING( CMD_OP_DESTBUFFER_INFO );
OUT_RING( BUF_3D_ID_DEPTH |
BUF_3D_PITCH(dev_priv->depth_pitch * dev_priv->cpp));
OUT_RING( dev_priv->zi1 );
} else if(tmp == dev_priv->back_di1) {
OUT_RING( CMD_OP_DESTBUFFER_INFO );
OUT_RING( BUF_3D_ID_COLOR_BACK |
BUF_3D_PITCH(dev_priv->back_pitch * dev_priv->cpp) |
BUF_3D_USE_FENCE);
OUT_RING( tmp );
OUT_RING( CMD_OP_DESTBUFFER_INFO );
OUT_RING( BUF_3D_ID_DEPTH | BUF_3D_USE_FENCE |
BUF_3D_PITCH(dev_priv->depth_pitch * dev_priv->cpp));
OUT_RING( dev_priv->zi1 );
} else {
DRM_DEBUG("bad di1 %x (allow %x or %x)\n",
tmp, dev_priv->front_di1, dev_priv->back_di1);
}
/* invarient:
*/
OUT_RING( GFX_OP_DESTBUFFER_VARS );
OUT_RING( code[I830_DESTREG_DV1] );
OUT_RING( GFX_OP_DRAWRECT_INFO );
OUT_RING( code[I830_DESTREG_DR1] );
OUT_RING( code[I830_DESTREG_DR2] );
OUT_RING( code[I830_DESTREG_DR3] );
OUT_RING( code[I830_DESTREG_DR4] );
/* Need to verify this */
tmp = code[I830_DESTREG_SENABLE];
if((tmp & ~0x3) == GFX_OP_SCISSOR_ENABLE) {
OUT_RING( tmp );
} else {
DRM_DEBUG("bad scissor enable\n");
OUT_RING( 0 );
}
OUT_RING( code[I830_DESTREG_SENABLE] );
OUT_RING( GFX_OP_SCISSOR_RECT );
OUT_RING( code[I830_DESTREG_SR1] );
OUT_RING( code[I830_DESTREG_SR2] );
ADVANCE_LP_RING();
}
static void i830EmitState( drm_device_t *dev )
{
drm_i830_private_t *dev_priv = dev->dev_private;
drm_i830_sarea_t *sarea_priv = dev_priv->sarea_priv;
unsigned int dirty = sarea_priv->dirty;
if (dirty & I830_UPLOAD_BUFFERS) {
i830EmitDestVerified( dev, sarea_priv->BufferState );
sarea_priv->dirty &= ~I830_UPLOAD_BUFFERS;
}
if (dirty & I830_UPLOAD_CTX) {
i830EmitContextVerified( dev, sarea_priv->ContextState );
sarea_priv->dirty &= ~I830_UPLOAD_CTX;
}
if (dirty & I830_UPLOAD_TEX0) {
i830EmitTexVerified( dev, sarea_priv->TexState[0] );
sarea_priv->dirty &= ~I830_UPLOAD_TEX0;
}
if (dirty & I830_UPLOAD_TEX1) {
i830EmitTexVerified( dev, sarea_priv->TexState[1] );
sarea_priv->dirty &= ~I830_UPLOAD_TEX1;
}
if (dirty & I830_UPLOAD_TEXBLEND0) {
i830EmitTexBlendVerified( dev, sarea_priv->TexBlendState[0],
sarea_priv->TexBlendStateWordsUsed[0]);
sarea_priv->dirty &= ~I830_UPLOAD_TEXBLEND0;
}
if (dirty & I830_UPLOAD_TEXBLEND1) {
i830EmitTexBlendVerified( dev, sarea_priv->TexBlendState[1],
sarea_priv->TexBlendStateWordsUsed[1]);
sarea_priv->dirty &= ~I830_UPLOAD_TEXBLEND1;
}
if (dirty & I830_UPLOAD_TEX_PALETTE_SHARED) {
i830EmitTexPalette(dev, sarea_priv->Palette[0], 0, 1);
} else {
if (dirty & I830_UPLOAD_TEX_PALETTE_N(0)) {
i830EmitTexPalette(dev, sarea_priv->Palette[0], 0, 0);
sarea_priv->dirty &= ~I830_UPLOAD_TEX_PALETTE_N(0);
}
if (dirty & I830_UPLOAD_TEX_PALETTE_N(1)) {
i830EmitTexPalette(dev, sarea_priv->Palette[1], 1, 0);
sarea_priv->dirty &= ~I830_UPLOAD_TEX_PALETTE_N(1);
}
}
}
static void i830_dma_dispatch_clear( drm_device_t *dev, int flags,
unsigned int clear_color,
unsigned int clear_zval,
unsigned int clear_depthmask)
{
drm_i830_private_t *dev_priv = dev->dev_private;
drm_i830_sarea_t *sarea_priv = dev_priv->sarea_priv;
int nbox = sarea_priv->nbox;
drm_clip_rect_t *pbox = sarea_priv->boxes;
int pitch = dev_priv->pitch;
int cpp = dev_priv->cpp;
int i;
unsigned int BR13, CMD, D_CMD;
RING_LOCALS;
i830_kernel_lost_context(dev);
switch(cpp) {
case 2:
BR13 = (0xF0 << 16) | (pitch * cpp) | (1<<24);
D_CMD = CMD = XY_COLOR_BLT_CMD;
break;
case 4:
BR13 = (0xF0 << 16) | (pitch * cpp) | (1<<24) | (1<<25);
CMD = (XY_COLOR_BLT_CMD | XY_COLOR_BLT_WRITE_ALPHA |
XY_COLOR_BLT_WRITE_RGB);
D_CMD = XY_COLOR_BLT_CMD;
if(clear_depthmask & 0x00ffffff)
D_CMD |= XY_COLOR_BLT_WRITE_RGB;
if(clear_depthmask & 0xff000000)
D_CMD |= XY_COLOR_BLT_WRITE_ALPHA;
break;
default:
BR13 = (0xF0 << 16) | (pitch * cpp) | (1<<24);
D_CMD = CMD = XY_COLOR_BLT_CMD;
break;
}
if (nbox > I830_NR_SAREA_CLIPRECTS)
nbox = I830_NR_SAREA_CLIPRECTS;
for (i = 0 ; i < nbox ; i++, pbox++) {
if (pbox->x1 > pbox->x2 ||
pbox->y1 > pbox->y2 ||
pbox->x2 > dev_priv->w ||
pbox->y2 > dev_priv->h)
continue;
if ( flags & I830_FRONT ) {
DRM_DEBUG("clear front\n");
BEGIN_LP_RING( 6 );
OUT_RING( CMD );
OUT_RING( BR13 );
OUT_RING( (pbox->y1 << 16) | pbox->x1 );
OUT_RING( (pbox->y2 << 16) | pbox->x2 );
OUT_RING( 0 );
OUT_RING( clear_color );
ADVANCE_LP_RING();
}
if ( flags & I830_BACK ) {
DRM_DEBUG("clear back\n");
BEGIN_LP_RING( 6 );
OUT_RING( CMD );
OUT_RING( BR13 );
OUT_RING( (pbox->y1 << 16) | pbox->x1 );
OUT_RING( (pbox->y2 << 16) | pbox->x2 );
OUT_RING( dev_priv->back_offset );
OUT_RING( clear_color );
ADVANCE_LP_RING();
}
if ( flags & I830_DEPTH ) {
DRM_DEBUG("clear depth\n");
BEGIN_LP_RING( 6 );
OUT_RING( D_CMD );
OUT_RING( BR13 );
OUT_RING( (pbox->y1 << 16) | pbox->x1 );
OUT_RING( (pbox->y2 << 16) | pbox->x2 );
OUT_RING( dev_priv->depth_offset );
OUT_RING( clear_zval );
ADVANCE_LP_RING();
}
}
}
static void i830_dma_dispatch_swap( drm_device_t *dev )
{
drm_i830_private_t *dev_priv = dev->dev_private;
drm_i830_sarea_t *sarea_priv = dev_priv->sarea_priv;
int nbox = sarea_priv->nbox;
drm_clip_rect_t *pbox = sarea_priv->boxes;
int pitch = dev_priv->pitch;
int cpp = dev_priv->cpp;
int ofs = dev_priv->back_offset;
int i;
unsigned int CMD, BR13;
RING_LOCALS;
DRM_DEBUG("swapbuffers\n");
switch(cpp) {
case 2:
BR13 = (pitch * cpp) | (0xCC << 16) | (1<<24);
CMD = XY_SRC_COPY_BLT_CMD;
break;
case 4:
BR13 = (pitch * cpp) | (0xCC << 16) | (1<<24) | (1<<25);
CMD = (XY_SRC_COPY_BLT_CMD | XY_SRC_COPY_BLT_WRITE_ALPHA |
XY_SRC_COPY_BLT_WRITE_RGB);
break;
default:
BR13 = (pitch * cpp) | (0xCC << 16) | (1<<24);
CMD = XY_SRC_COPY_BLT_CMD;
break;
}
i830_kernel_lost_context(dev);
if (nbox > I830_NR_SAREA_CLIPRECTS)
nbox = I830_NR_SAREA_CLIPRECTS;
for (i = 0 ; i < nbox; i++, pbox++)
{
if (pbox->x1 > pbox->x2 ||
pbox->y1 > pbox->y2 ||
pbox->x2 > dev_priv->w ||
pbox->y2 > dev_priv->h)
continue;
DRM_DEBUG("dispatch swap %d,%d-%d,%d!\n",
pbox->x1, pbox->y1,
pbox->x2, pbox->y2);
BEGIN_LP_RING( 8 );
OUT_RING( CMD );
OUT_RING( BR13 );
OUT_RING( (pbox->y1 << 16) |
pbox->x1 );
OUT_RING( (pbox->y2 << 16) |
pbox->x2 );
OUT_RING( 0 /* front ofs always zero */ );
OUT_RING( (pbox->y1 << 16) |
pbox->x1 );
OUT_RING( BR13 & 0xffff );
OUT_RING( ofs );
ADVANCE_LP_RING();
}
}
static void i830_dma_dispatch_vertex(drm_device_t *dev,
drm_buf_t *buf,
int discard,
int used)
{
drm_i830_private_t *dev_priv = dev->dev_private;
drm_i830_buf_priv_t *buf_priv = buf->dev_private;
drm_i830_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, u;
RING_LOCALS;
i830_kernel_lost_context(dev);
if (nbox > I830_NR_SAREA_CLIPRECTS)
nbox = I830_NR_SAREA_CLIPRECTS;
if (discard) {
u = cmpxchg(buf_priv->in_use, I830_BUF_CLIENT,
I830_BUF_HARDWARE);
if(u != I830_BUF_CLIENT) {
DRM_DEBUG("xxxx 2\n");
}
}
if (used > 4*1024)
used = 0;
if (sarea_priv->dirty)
i830EmitState( dev );
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( "i830_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);
if (buf_priv->currently_mapped == I830_BUF_MAPPED) {
*(u32 *)buf_priv->virtual = (GFX_OP_PRIMITIVE |
sarea_priv->vertex_prim |
((used/4)-2));
if (used & 4) {
*(u32 *)((u32)buf_priv->virtual + used) = 0;
used += 4;
}
i830_unmap_buffer(buf);
}
if (used) {
do {
if (i < nbox) {
BEGIN_LP_RING(6);
OUT_RING( GFX_OP_DRAWRECT_INFO );
OUT_RING( sarea_priv->BufferState[I830_DESTREG_DR1] );
OUT_RING( box[i].x1 | (box[i].y1<<16) );
OUT_RING( box[i].x2 | (box[i].y2<<16) );
OUT_RING( sarea_priv->BufferState[I830_DESTREG_DR4] );
OUT_RING( 0 );
ADVANCE_LP_RING();
}
BEGIN_LP_RING(4);
OUT_RING( MI_BATCH_BUFFER );
OUT_RING( start | MI_BATCH_NON_SECURE );
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( I830_BUF_FREE );
OUT_RING( 0 );
}
OUT_RING( CMD_REPORT_HEAD );
OUT_RING( 0 );
ADVANCE_LP_RING();
}
/* Interrupts are only for flushing */
void i830_dma_service(int irq, void *device, struct pt_regs *regs)
{
drm_device_t *dev = (drm_device_t *)device;
drm_i830_private_t *dev_priv = (drm_i830_private_t *)dev->dev_private;
u16 temp;
temp = I830_READ16(I830REG_INT_IDENTITY_R);
temp = temp & ~(0x6000);
if(temp != 0) I830_WRITE16(I830REG_INT_IDENTITY_R,
temp); /* Clear all interrupts */
else
return;
queue_task(&dev->tq, &tq_immediate);
mark_bh(IMMEDIATE_BH);
}
void DRM(dma_immediate_bh)(void *device)
{
drm_device_t *dev = (drm_device_t *) device;
drm_i830_private_t *dev_priv = (drm_i830_private_t *)dev->dev_private;
atomic_set(&dev_priv->flush_done, 1);
wake_up_interruptible(&dev_priv->flush_queue);
}
static inline void i830_dma_emit_flush(drm_device_t *dev)
{
drm_i830_private_t *dev_priv = dev->dev_private;
RING_LOCALS;
i830_kernel_lost_context(dev);
BEGIN_LP_RING(2);
OUT_RING( CMD_REPORT_HEAD );
OUT_RING( GFX_OP_USER_INTERRUPT );
ADVANCE_LP_RING();
i830_wait_ring( dev, dev_priv->ring.Size - 8 );
atomic_set(&dev_priv->flush_done, 1);
wake_up_interruptible(&dev_priv->flush_queue);
}
static inline void i830_dma_quiescent_emit(drm_device_t *dev)
{
drm_i830_private_t *dev_priv = dev->dev_private;
RING_LOCALS;
i830_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( 0 );
OUT_RING( GFX_OP_USER_INTERRUPT );
ADVANCE_LP_RING();
i830_wait_ring( dev, dev_priv->ring.Size - 8 );
atomic_set(&dev_priv->flush_done, 1);
wake_up_interruptible(&dev_priv->flush_queue);
}
void i830_dma_quiescent(drm_device_t *dev)
{
DECLARE_WAITQUEUE(entry, current);
drm_i830_private_t *dev_priv = (drm_i830_private_t *)dev->dev_private;
unsigned long end;
if(dev_priv == NULL) {
return;
}
atomic_set(&dev_priv->flush_done, 0);
add_wait_queue(&dev_priv->flush_queue, &entry);
end = jiffies + (HZ*3);
for (;;) {
current->state = TASK_INTERRUPTIBLE;
i830_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 i830_flush_queue(drm_device_t *dev)
{
DECLARE_WAITQUEUE(entry, current);
drm_i830_private_t *dev_priv = (drm_i830_private_t *)dev->dev_private;
drm_device_dma_t *dma = dev->dma;
unsigned long end;
int i, ret = 0;
if(dev_priv == NULL) {
return 0;
}
atomic_set(&dev_priv->flush_done, 0);
add_wait_queue(&dev_priv->flush_queue, &entry);
end = jiffies + (HZ*3);
for (;;) {
current->state = TASK_INTERRUPTIBLE;
i830_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);
for (i = 0; i < dma->buf_count; i++) {
drm_buf_t *buf = dma->buflist[ i ];
drm_i830_buf_priv_t *buf_priv = buf->dev_private;
int used = cmpxchg(buf_priv->in_use, I830_BUF_HARDWARE,
I830_BUF_FREE);
if (used == I830_BUF_HARDWARE)
DRM_DEBUG("reclaimed from HARDWARE\n");
if (used == I830_BUF_CLIENT)
DRM_DEBUG("still on client HARDWARE\n");
}
return ret;
}
/* Must be called with the lock held */
void i830_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) return;
if (!dma->buflist) return;
i830_flush_queue(dev);
for (i = 0; i < dma->buf_count; i++) {
drm_buf_t *buf = dma->buflist[ i ];
drm_i830_buf_priv_t *buf_priv = buf->dev_private;
if (buf->pid == pid && buf_priv) {
int used = cmpxchg(buf_priv->in_use, I830_BUF_CLIENT,
I830_BUF_FREE);
if (used == I830_BUF_CLIENT)
DRM_DEBUG("reclaimed from client\n");
if(buf_priv->currently_mapped == I830_BUF_MAPPED)
buf_priv->currently_mapped = I830_BUF_UNMAPPED;
}
}
}
int i830_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("i830_flush_ioctl\n");
if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
DRM_ERROR("i830_flush_ioctl called without lock held\n");
return -EINVAL;
}
i830_flush_queue(dev);
return 0;
}
int i830_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_device_dma_t *dma = dev->dma;
drm_i830_private_t *dev_priv = (drm_i830_private_t *)dev->dev_private;
u32 *hw_status = (u32 *)dev_priv->hw_status_page;
drm_i830_sarea_t *sarea_priv = (drm_i830_sarea_t *)
dev_priv->sarea_priv;
drm_i830_vertex_t vertex;
if (copy_from_user(&vertex, (drm_i830_vertex_t *)arg, sizeof(vertex)))
return -EFAULT;
if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
DRM_ERROR("i830_dma_vertex called without lock held\n");
return -EINVAL;
}
DRM_DEBUG("i830 dma vertex, idx %d used %d discard %d\n",
vertex.idx, vertex.used, vertex.discard);
if(vertex.idx < 0 || vertex.idx > dma->buf_count) return -EINVAL;
i830_dma_dispatch_vertex( dev,
dma->buflist[ vertex.idx ],
vertex.discard, vertex.used );
sarea_priv->last_enqueue = dev_priv->counter-1;
sarea_priv->last_dispatch = (int) hw_status[5];
return 0;
}
int i830_clear_bufs(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_i830_clear_t clear;
if (copy_from_user(&clear, (drm_i830_clear_t *)arg, sizeof(clear)))
return -EFAULT;
if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
DRM_ERROR("i830_clear_bufs called without lock held\n");
return -EINVAL;
}
/* GH: Someone's doing nasty things... */
if (!dev->dev_private) {
return -EINVAL;
}
i830_dma_dispatch_clear( dev, clear.flags,
clear.clear_color,
clear.clear_depth,
clear.clear_depthmask);
return 0;
}
int i830_swap_bufs(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("i830_swap_bufs\n");
if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
DRM_ERROR("i830_swap_buf called without lock held\n");
return -EINVAL;
}
i830_dma_dispatch_swap( dev );
return 0;
}
int i830_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_i830_private_t *dev_priv = (drm_i830_private_t *)dev->dev_private;
u32 *hw_status = (u32 *)dev_priv->hw_status_page;
drm_i830_sarea_t *sarea_priv = (drm_i830_sarea_t *)
dev_priv->sarea_priv;
sarea_priv->last_dispatch = (int) hw_status[5];
return 0;
}
int i830_getbuf(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;
int retcode = 0;
drm_i830_dma_t d;
drm_i830_private_t *dev_priv = (drm_i830_private_t *)dev->dev_private;
u32 *hw_status = (u32 *)dev_priv->hw_status_page;
drm_i830_sarea_t *sarea_priv = (drm_i830_sarea_t *)
dev_priv->sarea_priv;
DRM_DEBUG("getbuf\n");
if (copy_from_user(&d, (drm_i830_dma_t *)arg, sizeof(d)))
return -EFAULT;
if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
DRM_ERROR("i830_dma called without lock held\n");
return -EINVAL;
}
d.granted = 0;
retcode = i830_dma_get_buffer(dev, &d, filp);
DRM_DEBUG("i830_dma: %d returning %d, granted = %d\n",
current->pid, retcode, d.granted);
if (copy_to_user((drm_dma_t *)arg, &d, sizeof(d)))
return -EFAULT;
sarea_priv->last_dispatch = (int) hw_status[5];
return retcode;
}
int i830_copybuf(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_i830_copy_t d;
drm_i830_private_t *dev_priv = (drm_i830_private_t *)dev->dev_private;
u32 *hw_status = (u32 *)dev_priv->hw_status_page;
drm_i830_sarea_t *sarea_priv = (drm_i830_sarea_t *)
dev_priv->sarea_priv;
drm_buf_t *buf;
drm_i830_buf_priv_t *buf_priv;
drm_device_dma_t *dma = dev->dma;
if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
DRM_ERROR("i830_dma called without lock held\n");
return -EINVAL;
}
if (copy_from_user(&d, (drm_i830_copy_t *)arg, sizeof(d)))
return -EFAULT;
if(d.idx < 0 || d.idx > dma->buf_count) return -EINVAL;
buf = dma->buflist[ d.idx ];
buf_priv = buf->dev_private;
if (buf_priv->currently_mapped != I830_BUF_MAPPED) return -EPERM;
if(d.used < 0 || d.used > buf->total) return -EINVAL;
if (copy_from_user(buf_priv->virtual, d.address, d.used))
return -EFAULT;
sarea_priv->last_dispatch = (int) hw_status[5];
return 0;
}
int i830_docopy(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
if(VM_DONTCOPY == 0) return 1;
return 0;
}
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