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-rw-r--r--linux/i810_dma.c97
1 files changed, 36 insertions, 61 deletions
diff --git a/linux/i810_dma.c b/linux/i810_dma.c
index ffe7f669..91c204c5 100644
--- a/linux/i810_dma.c
+++ b/linux/i810_dma.c
@@ -26,15 +26,25 @@
*
* Authors: Rickard E. (Rik) Faith <faith@valinux.com>
* Jeff Hartmann <jhartmann@valinux.com>
- * Keith Whitwell <keith_whitwell@yahoo.com>
+ * Keith Whitwell <keith@tungstengraphics.com>
*
*/
#define __NO_VERSION__
#include "i810.h"
#include "drmP.h"
+#include "drm.h"
+#include "i810_drm.h"
#include "i810_drv.h"
#include <linux/interrupt.h> /* For task queue support */
+#include <linux/delay.h>
+#include <linux/pagemap.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 I810_BUF_FREE 2
#define I810_BUF_CLIENT 1
@@ -43,30 +53,10 @@
#define I810_BUF_UNMAPPED 0
#define I810_BUF_MAPPED 1
-#define RING_LOCALS unsigned int outring, ringmask; volatile char *virt;
-
-#define BEGIN_LP_RING(n) do { \
- if (0) DRM_DEBUG("BEGIN_LP_RING(%d) in %s\n", n, __FUNCTION__); \
- if (dev_priv->ring.space < n*4) \
- i810_wait_ring(dev, n*4); \
- dev_priv->ring.space -= n*4; \
- outring = dev_priv->ring.tail; \
- ringmask = dev_priv->ring.tail_mask; \
- virt = dev_priv->ring.virtual_start; \
-} while (0)
-
-#define ADVANCE_LP_RING() do { \
- if (0) DRM_DEBUG("ADVANCE_LP_RING\n"); \
- dev_priv->ring.tail = outring; \
- I810_WRITE(LP_RING + RING_TAIL, outring); \
-} while(0)
-
-#define OUT_RING(n) do { \
- if (0) DRM_DEBUG(" OUT_RING %x\n", (int)(n)); \
- *(volatile unsigned int *)(virt + outring) = n; \
- outring += 4; \
- outring &= ringmask; \
-} while (0)
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,2)
+#define down_write down
+#define up_write up
+#endif
static inline void i810_print_status_page(drm_device_t *dev)
{
@@ -127,14 +117,14 @@ static int i810_freelist_put(drm_device_t *dev, drm_buf_t *buf)
}
static struct file_operations i810_buffer_fops = {
- open: DRM(open),
- flush: DRM(flush),
- release: DRM(release),
- ioctl: DRM(ioctl),
- mmap: i810_mmap_buffers,
- read: DRM(read),
- fasync: DRM(fasync),
- poll: DRM(poll),
+ .open = DRM(open),
+ .flush = DRM(flush),
+ .release = DRM(release),
+ .ioctl = DRM(ioctl),
+ .mmap = i810_mmap_buffers,
+ .read = DRM(read),
+ .fasync = DRM(fasync),
+ .poll = DRM(poll),
};
int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
@@ -157,7 +147,7 @@ int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
buf_priv->currently_mapped = I810_BUF_MAPPED;
unlock_kernel();
- if (remap_page_range(vma->vm_start,
+ 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;
@@ -175,11 +165,7 @@ static int i810_map_buffer(drm_buf_t *buf, struct file *filp)
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
old_fops = filp->f_op;
filp->f_op = &i810_buffer_fops;
dev_priv->mmap_buffer = buf;
@@ -191,15 +177,12 @@ static int i810_map_buffer(drm_buf_t *buf, struct file *filp)
filp->f_op = old_fops;
if ((unsigned long)buf_priv->virtual > -1024UL) {
/* Real error */
- DRM_DEBUG("mmap error\n");
+ DRM_ERROR("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
+
return retcode;
}
@@ -210,19 +193,13 @@ static int i810_unmap_buffer(drm_buf_t *buf)
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
- retcode = do_munmap(current->mm,
+
+ down_write(&current->mm->mmap_sem);
+ retcode = DO_MUNMAP(current->mm,
(unsigned long)buf_priv->virtual,
(size_t) buf->total);
-#if LINUX_VERSION_CODE <= 0x020402
- up( &current->mm->mmap_sem );
-#else
- up_write( &current->mm->mmap_sem );
-#endif
+ up_write(&current->mm->mmap_sem);
+
buf_priv->currently_mapped = I810_BUF_UNMAPPED;
buf_priv->virtual = 0;
@@ -247,7 +224,7 @@ static int i810_dma_get_buffer(drm_device_t *dev, drm_i810_dma_t *d,
retcode = i810_map_buffer(buf, filp);
if(retcode) {
i810_freelist_put(dev, buf);
- DRM_DEBUG("mapbuf failed, retcode %d\n", retcode);
+ DRM_ERROR("mapbuf failed, retcode %d\n", retcode);
return retcode;
}
buf->pid = priv->pid;
@@ -303,8 +280,6 @@ static int i810_wait_ring(drm_device_t *dev, int n)
end = jiffies + (HZ*3);
while (ring->space < n) {
- int i;
-
ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
ring->space = ring->head - (ring->tail+8);
if (ring->space < 0) ring->space += ring->Size;
@@ -313,13 +288,12 @@ static int i810_wait_ring(drm_device_t *dev, int n)
end = jiffies + (HZ*3);
iters++;
- if((signed)(end - jiffies) <= 0) {
+ if(time_before(end, jiffies)) {
DRM_ERROR("space: %d wanted %d\n", ring->space, n);
DRM_ERROR("lockup\n");
goto out_wait_ring;
}
-
- for (i = 0 ; i < 2000 ; i++) ;
+ udelay(1);
}
out_wait_ring:
@@ -1178,7 +1152,8 @@ int i810_ov0_info(struct inode *inode, struct file *filp,
data.offset = dev_priv->overlay_offset;
data.physical = dev_priv->overlay_physical;
- copy_to_user((drm_i810_overlay_t *)arg,&data,sizeof(data));
+ if (copy_to_user((drm_i810_overlay_t *)arg,&data,sizeof(data)))
+ return -EFAULT;
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 10:47:35 +0000