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-rw-r--r--shared/i830_compat.c392
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diff --git a/shared/i830_compat.c b/shared/i830_compat.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 <keith@tungstengraphics.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 */
+#include <linux/pagemap.h> /* For FASTCALL on unlock_page() */
+#include <linux/delay.h>
+
+#ifdef DO_MUNMAP_4_ARGS
+#define DO_MUNMAP(m, a, l) do_munmap(m, a, l, 1)
+#else
+#define DO_MUNMAP(m, a, l) do_munmap(m, a, l)
+#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
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,2)
+#define down_write down
+#define up_write up
+#endif
+
+/* Code to support the original i810-style security model which
+ * involved unmapping any buffers not owned by individual clients, in
+ * particular buffers submitted to the ring awaiting processing by
+ * hardware.
+ *
+ * New instructions in i830 and above provide an alternate security
+ * model, much simpler to make portable across operating systems.
+ * This code is fairly hacky (in particularly the way filep->fops is
+ * swapped out) and has never been ported beyond linux.
+ *
+ * New clients use the I830_GETBUF2 ioctl which doesn't do any of this
+ * stuff, and rely on a secure implementation of I830_VERTEX.
+ */
+
+static 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(DRM_RPR_ARG(vma) vma->vm_start,
+ VM_OFFSET(vma),
+ vma->vm_end - vma->vm_start,
+ vma->vm_page_prot)) return -EAGAIN;
+ 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,
+ .fasync = DRM(fasync),
+};
+
+
+
+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;
+
+ down_write( &current->mm->mmap_sem );
+ 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 (IS_ERR(buf_priv->virtual)) {
+ /* Real error */
+ DRM_ERROR("mmap error\n");
+ retcode = PTR_ERR(buf_priv->virtual);
+ buf_priv->virtual = 0;
+ }
+ up_write( &current->mm->mmap_sem );
+
+ 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(buf_priv->currently_mapped != I830_BUF_MAPPED)
+ return -EINVAL;
+
+ down_write(&current->mm->mmap_sem);
+ retcode = DO_MUNMAP(current->mm,
+ (unsigned long)buf_priv->virtual,
+ (size_t) buf->total);
+ up_write(&current->mm->mmap_sem);
+
+ 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_buf_t *buf;
+ drm_i830_buf_priv_t *buf_priv;
+ drm_device_dma_t *dma = dev->dma;
+ int i, ret;
+
+ /* Never use the last dma buffer, hw errata.
+ */
+ for (i = 0; i < dma->buf_count - 1; i++) {
+
+ buf = dma->buflist[i];
+ buf_priv = buf->dev_private;
+
+ if (cmpxchg(buf_priv->in_use,
+ I830_BUF_FREE,
+ I830_BUF_CLIENT) == I830_BUF_FREE)
+ goto got_buf;
+ }
+ return DRM_ERR(ENOMEM);
+
+ got_buf:
+ ret = i830_map_buffer(buf, filp);
+ if (ret) {
+ (void) cmpxchg(buf_priv->in_use,
+ I830_BUF_CLIENT,
+ I830_BUF_FREE);
+
+ DRM_ERROR("mapbuf failed, retcode %d\n", ret);
+ return ret;
+ }
+
+
+ buf->filp = filp;
+ buf_priv = buf->dev_private;
+ d->granted = 1;
+ d->request_idx = buf->idx;
+ d->request_size = buf->total;
+ d->virtual = buf_priv->virtual;
+
+ return 0;
+}
+
+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*1023)
+ 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 *vp = buf_priv->virtual;
+
+ vp[0] = (GFX_OP_PRIMITIVE |
+ sarea_priv->vertex_prim |
+ ((used/4)-2));
+
+ if (dev_priv->use_mi_batchbuffer_start) {
+ vp[used/4] = MI_BATCH_BUFFER_END;
+ used += 4;
+ }
+
+ if (used & 4) {
+ vp[used/4] = 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();
+ }
+
+ if (dev_priv->use_mi_batchbuffer_start) {
+ BEGIN_LP_RING(2);
+ OUT_RING( MI_BATCH_BUFFER_START | (2<<6) );
+ OUT_RING( start | MI_BATCH_NON_SECURE );
+ ADVANCE_LP_RING();
+ }
+ else {
+ 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);
+ }
+
+ if (discard) {
+ dev_priv->counter++;
+
+ (void) cmpxchg(buf_priv->in_use, I830_BUF_CLIENT,
+ I830_BUF_HARDWARE);
+
+ BEGIN_LP_RING(8);
+ 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( I830_BUF_FREE );
+ OUT_RING( CMD_REPORT_HEAD );
+ OUT_RING( 0 );
+ ADVANCE_LP_RING();
+ }
+}
+
+
+int i830_getbuf( DRM_IOCTL_ARGS )
+{
+ 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 = dev_priv->hw_status_page;
+ drm_i830_sarea_t *sarea_priv = (drm_i830_sarea_t *)
+ dev_priv->sarea_priv;
+
+ DRM_DEBUG("getbuf\n");
+ DRM_COPY_FROM_USER_IOCTL( d, (drm_i830_dma_t *)data, sizeof(d));
+
+ if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
+ DRM_ERROR("i830_dma called without lock held\n");
+ return DRM_ERR(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 (DRM_COPY_TO_USER((drm_dma_t *)data, &d, sizeof(d)))
+ return DRM_ERR(EFAULT);
+
+ sarea_priv->last_dispatch = (int) hw_status[5];
+
+ return retcode;
+}
+
+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 = 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;
+}
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