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athe patch below optimises the drm code to not do put_user() on memory the 

kernel allocated and then mmap-installed to userspace, but instead
    makes it use the kernel virtual address directly instead.
From: Arjan van de Ven <arjanv@redhat.com>
main
Dave Airlie 2004-07-31 07:25:58 +00:00
parent 1cec18a5cd
commit dc4508c338
4 changed files with 16 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
linux-core/i810_dma.c
View File

@ -851,13 +851,10 @@ static void i810_dma_dispatch_vertex(drm_device_t *dev,
if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
unsigned int prim = (sarea_priv->vertex_prim & PR_MASK);
put_user((GFX_OP_PRIMITIVE | prim |
((used/4)-2)),
(u32 __user *)buf_priv->virtual);
*(u32 *)buf_priv->kernel_virtual = ((GFX_OP_PRIMITIVE | prim | ((used/4)-2)));
if (used & 4) {
put_user(0,
(u32 __user *)((u32)buf_priv->virtual + used));
*(u32 *)((u32)buf_priv->kernel_virtual + used) = 0;
used += 4;
}

12
linux-core/i830_dma.c
View File

@ -1173,19 +1173,19 @@ static void i830_dma_dispatch_vertex(drm_device_t *dev,
DRM_DEBUG( "start + used - 4 : %ld\n", start + used - 4);
if (buf_priv->currently_mapped == I830_BUF_MAPPED) {
u32 __user *vp = buf_priv->virtual;
u32 *vp = buf_priv->kernel_virtual;
put_user( (GFX_OP_PRIMITIVE |
sarea_priv->vertex_prim |
((used/4)-2)), &vp[0]);
vp[0] = (GFX_OP_PRIMITIVE |
sarea_priv->vertex_prim |
((used/4)-2));
if (dev_priv->use_mi_batchbuffer_start) {
put_user(MI_BATCH_BUFFER_END, &vp[used/4]);
vp[used/4] = MI_BATCH_BUFFER_END;
used += 4;
}
if (used & 4) {
put_user(0, &vp[used/4]);
vp[used/4] = 0;
used += 4;
}

7
linux/i810_dma.c
View File

@ -851,13 +851,10 @@ static void i810_dma_dispatch_vertex(drm_device_t *dev,
if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
unsigned int prim = (sarea_priv->vertex_prim & PR_MASK);
put_user((GFX_OP_PRIMITIVE | prim |
((used/4)-2)),
(u32 __user *)buf_priv->virtual);
*(u32 *)buf_priv->kernel_virtual = ((GFX_OP_PRIMITIVE | prim | ((used/4)-2)));
if (used & 4) {
put_user(0,
(u32 __user *)((u32)buf_priv->virtual + used));
*(u32 *)((u32)buf_priv->kernel_virtual + used) = 0;
used += 4;
}

12
linux/i830_dma.c
View File

@ -1173,19 +1173,19 @@ static void i830_dma_dispatch_vertex(drm_device_t *dev,
DRM_DEBUG( "start + used - 4 : %ld\n", start + used - 4);
if (buf_priv->currently_mapped == I830_BUF_MAPPED) {
u32 __user *vp = buf_priv->virtual;
u32 *vp = buf_priv->kernel_virtual;
put_user( (GFX_OP_PRIMITIVE |
sarea_priv->vertex_prim |
((used/4)-2)), &vp[0]);
vp[0] = (GFX_OP_PRIMITIVE |
sarea_priv->vertex_prim |
((used/4)-2));
if (dev_priv->use_mi_batchbuffer_start) {
put_user(MI_BATCH_BUFFER_END, &vp[used/4]);
vp[used/4] = MI_BATCH_BUFFER_END;
used += 4;
}
if (used & 4) {
put_user(0, &vp[used/4]);
vp[used/4] = 0;
used += 4;
}