patch-2.4.20 linux-2.4.20/drivers/char/drm/i810_dma.c

• Lines: 350
• Date: Thu Nov 28 15:53:12 2002
• Orig file: linux-2.4.19/drivers/char/drm/i810_dma.c
• Orig date: Fri Aug 2 17:39:43 2002

diff -urN linux-2.4.19/drivers/char/drm/i810_dma.c linux-2.4.20/drivers/char/drm/i810_dma.c
@@ -30,11 +30,12 @@
  *
  */
 
-#define __NO_VERSION__
+#include <linux/config.h>
 #include "i810.h"
 #include "drmP.h"
 #include "i810_drv.h"
 #include <linux/interrupt.h>	/* For task queue support */
+#include <linux/module.h>
 
 /* in case we don't have a 2.3.99-pre6 kernel or later: */
 #ifndef VM_DONTCOPY
@@ -73,7 +74,7 @@
 	*(volatile unsigned int *)(virt + outring) = n;			\
 	outring += 4;							\
 	outring &= ringmask;						\
-} while (0);
+} while (0)
 
 static inline void i810_print_status_page(drm_device_t *dev)
 {
@@ -86,6 +87,7 @@
    	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: Last Render: %x\n", temp[4]);
    	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]);
@@ -182,11 +184,7 @@
 	if(buf_priv->currently_mapped == I810_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 = &i810_buffer_fops;
 		dev_priv->mmap_buffer = buf;
@@ -202,11 +200,7 @@
 			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 = I810_BUF_MAPPED;
@@ -222,24 +216,11 @@
 	if(VM_DONTCOPY != 0) {
 		if(buf_priv->currently_mapped != I810_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 = I810_BUF_UNMAPPED;
    	buf_priv->virtual = 0;
@@ -278,30 +259,6 @@
 	return retcode;
 }
 
-static unsigned long i810_alloc_page(drm_device_t *dev)
-{
-	unsigned long address;
-
-	address = __get_free_page(GFP_KERNEL);
-	if(address == 0UL)
-		return 0;
-
-	get_page(virt_to_page(address));
-	LockPage(virt_to_page(address));
-
-	return address;
-}
-
-static void i810_free_page(drm_device_t *dev, unsigned long page)
-{
-	if (page) {
-		struct page *p = virt_to_page(page);
-		put_page(p);
-		UnlockPage(p);
-		free_page(page);
-	}
-}
-
 static int i810_dma_cleanup(drm_device_t *dev)
 {
 	drm_device_dma_t *dma = dev->dma;
@@ -316,7 +273,8 @@
 					 dev_priv->ring.Size);
 		}
 	   	if(dev_priv->hw_status_page != 0UL) {
-		   	i810_free_page(dev, dev_priv->hw_status_page);
+		   	pci_free_consistent(dev->pdev, PAGE_SIZE, (void *)dev_priv->hw_status_page,
+		   		dev_priv->dma_status_page);
 		   	/* Need to rewrite hardware status page */
 		   	I810_WRITE(0x02080, 0x1ffff000);
 		}
@@ -474,12 +432,16 @@
 	dev_priv->back_offset = init->back_offset;
 	dev_priv->depth_offset = init->depth_offset;
 
+	dev_priv->overlay_offset = init->overlay_offset;
+	dev_priv->overlay_physical = init->overlay_physical;
+
 	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;
 
    	/* Program Hardware Status Page */
-   	dev_priv->hw_status_page = i810_alloc_page(dev);
+   	dev_priv->hw_status_page = (unsigned long)pci_alloc_consistent(dev->pdev, PAGE_SIZE,
+   			&dev_priv->dma_status_page);
    	if(dev_priv->hw_status_page == 0UL) {
 		dev->dev_private = (void *)dev_priv;
 		i810_dma_cleanup(dev);
@@ -489,7 +451,7 @@
    	memset((void *) dev_priv->hw_status_page, 0, PAGE_SIZE);
    	DRM_DEBUG("hw status page @ %lx\n", dev_priv->hw_status_page);
 
-   	I810_WRITE(0x02080, virt_to_bus((void *)dev_priv->hw_status_page));
+   	I810_WRITE(0x02080, dev_priv->dma_status_page);
    	DRM_DEBUG("Enabled hardware status page\n");
 
    	/* Now we need to init our freelist */
@@ -505,6 +467,15 @@
    	return 0;
 }
 
+#ifdef CONFIG_DRM_I810_XFREE_41
+int xfreeversion = 41;
+#else
+int xfreeversion = -1;
+#endif
+
+MODULE_PARM(xfreeversion, "i");
+MODULE_PARM_DESC(xfreeversion, "The version of XFree86 that needs to be supported");
+
 int i810_dma_init(struct inode *inode, struct file *filp,
 		  unsigned int cmd, unsigned long arg)
 {
@@ -516,6 +487,28 @@
 
   	if (copy_from_user(&init, (drm_i810_init_t *)arg, sizeof(init)))
 		return -EFAULT;
+		
+	if ((xfreeversion == 41) ||
+	    ((xfreeversion == -1) && (init.pitch == 0))) {
+		/*
+		 * Ok we have a problem here.  Someone decided it was
+		 * funny to add two fields in the middle of the
+		 * drm_i810_init_it structure in the transition between
+		 * XFree86 4.1.0 and 4.2.0.
+		 *
+		 * The code below tries to fix this ABI breakage up as
+		 * good as possible, unfortionatly it's impossible to
+		 * autodetect which interface the user wants, hence the
+		 * module parameter -- Arjan
+		 */
+
+	 	init.pitch_bits = init.h;
+	 	init.pitch = init.w;
+	 	init.h = init.overlay_physical;
+	 	init.w = init.overlay_offset;
+	 	init.overlay_physical = 0;
+	 	init.overlay_offset = 0;
+	}
 
    	switch(init.func) {
 	 	case I810_INIT_DMA:
@@ -1262,3 +1255,156 @@
 	if(VM_DONTCOPY == 0) return 1;
 	return 0;
 }
+
+static void i810_dma_dispatch_mc(drm_device_t *dev, drm_buf_t *buf, int used,
+		unsigned int last_render)
+{
+	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;
+	unsigned long address = (unsigned long)buf->bus_address;
+	unsigned long start = address - dev->agp->base;
+	int u;
+	RING_LOCALS;
+
+	i810_kernel_lost_context(dev);
+
+	u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
+		I810_BUF_HARDWARE);
+	if(u != I810_BUF_CLIENT) {
+		DRM_DEBUG("MC found buffer that isn't mine!\n");
+	}
+
+	if (used > 4*1024)
+		used = 0;
+
+	sarea_priv->dirty = 0x7f;
+
+	DRM_DEBUG("dispatch mc addr 0x%lx, used 0x%x\n",
+		address, used);
+
+	dev_priv->counter++;
+	DRM_DEBUG("dispatch counter : %ld\n", dev_priv->counter);
+	DRM_DEBUG("i810_dma_dispatch_mc\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 == I810_BUF_MAPPED) {
+		if (used & 4) {
+			*(u32 *)((u32)buf_priv->virtual + used) = 0;
+			used += 4;
+		}
+
+		i810_unmap_buffer(buf);
+	}
+	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();
+
+
+	BEGIN_LP_RING(8);
+	OUT_RING( CMD_STORE_DWORD_IDX );
+	OUT_RING( buf_priv->my_use_idx );
+	OUT_RING( I810_BUF_FREE );
+	OUT_RING( 0 );
+
+	OUT_RING( CMD_STORE_DWORD_IDX );
+	OUT_RING( 16 );
+	OUT_RING( last_render );
+	OUT_RING( 0 );
+	ADVANCE_LP_RING();
+}
+
+int i810_dma_mc(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_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_mc_t mc;
+
+	if (copy_from_user(&mc, (drm_i810_mc_t *)arg, sizeof(mc)))
+		return -EFAULT;
+
+
+	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
+		DRM_ERROR("i810_dma_mc called without lock held\n");
+		return -EINVAL;
+	}
+
+	i810_dma_dispatch_mc(dev, dma->buflist[mc.idx], mc.used,
+		mc.last_render );
+
+	atomic_add(mc.used, &dev->counts[_DRM_STAT_SECONDARY]);
+	atomic_inc(&dev->counts[_DRM_STAT_DMA]);
+	sarea_priv->last_enqueue = dev_priv->counter-1;
+	sarea_priv->last_dispatch = (int) hw_status[5];
+
+	return 0;
+}
+
+int i810_rstatus(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;
+
+	return (int)(((u32 *)(dev_priv->hw_status_page))[4]);
+}
+
+int i810_ov0_info(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;
+	drm_i810_overlay_t data;
+
+	data.offset = dev_priv->overlay_offset;
+	data.physical = dev_priv->overlay_physical;
+	copy_to_user((drm_i810_overlay_t *)arg,&data,sizeof(data));
+	return 0;
+}
+
+int i810_fstatus(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;
+
+	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
+		DRM_ERROR("i810_fstatus called without lock held\n");
+		return -EINVAL;
+	}
+	return I810_READ(0x30008);
+}
+
+int i810_ov0_flip(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;
+
+	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
+		DRM_ERROR("i810_ov0_flip called without lock held\n");
+		return -EINVAL;
+	}
+
+	//Tell the overlay to update
+	I810_WRITE(0x30000,dev_priv->overlay_physical | 0x80000000);
+
+	return 0;
+}
+
+