diff options
Diffstat (limited to 'bsd/i830_dma.c')
| -rw-r--r-- | bsd/i830_dma.c | 1420 |
1 files changed, 1420 insertions, 0 deletions
diff --git a/bsd/i830_dma.c b/bsd/i830_dma.c new file mode 100644 index 00000000..fbdc9523 --- /dev/null +++ b/bsd/i830_dma.c @@ -0,0 +1,1420 @@ +/* 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 "drm.h" +#include "i830_drm.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( ¤t->mm->mmap_sem ); +#else + down_write( ¤t->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( ¤t->mm->mmap_sem ); +#else + up_write( ¤t->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( ¤t->mm->mmap_sem ); +#else + down_write( ¤t->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( ¤t->mm->mmap_sem ); +#else + up_write( ¤t->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; +} |