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From: Dave Airlie <airlied@redhat.com>
Date: Mon, 6 Aug 2007 23:09:51 +0000 (+1000)
Subject: drm/i915: Fix i965 secured batchbuffer usage
X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=21f16289270447673a7263ccc0b22d562fb01ecb
drm/i915: Fix i965 secured batchbuffer usage
This 965G and above chipsets moved the batch buffer non-secure bits to
another place. This means that previous drm's allowed in-secure batchbuffers
to be submitted to the hardware from non-privileged users who are logged
into X and and have access to direct rendering.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
diff --git a/drivers/char/drm/i915_dma.c b/drivers/char/drm/i915_dma.c
index 3359cc2..8e7d713 100644
--- a/drivers/char/drm/i915_dma.c
+++ b/drivers/char/drm/i915_dma.c
@@ -184,6 +184,8 @@ static int i915_initialize(struct drm_device * dev,
* private backbuffer/depthbuffer usage.
*/
dev_priv->use_mi_batchbuffer_start = 0;
+ if (IS_I965G(dev)) /* 965 doesn't support older method */
+ dev_priv->use_mi_batchbuffer_start = 1;
/* Allow hardware batchbuffers unless told otherwise.
*/
@@ -517,8 +519,13 @@ static int i915_dispatch_batchbuffer(struct drm_device * dev,
if (dev_priv->use_mi_batchbuffer_start) {
BEGIN_LP_RING(2);
- OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
- OUT_RING(batch->start | MI_BATCH_NON_SECURE);
+ if (IS_I965G(dev)) {
+ OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
+ OUT_RING(batch->start);
+ } else {
+ OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
+ OUT_RING(batch->start | MI_BATCH_NON_SECURE);
+ }
ADVANCE_LP_RING();
} else {
BEGIN_LP_RING(4);
@@ -735,7 +742,8 @@ static int i915_setparam(DRM_IOCTL_ARGS)
switch (param.param) {
case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
- dev_priv->use_mi_batchbuffer_start = param.value;
+ if (!IS_I965G(dev))
+ dev_priv->use_mi_batchbuffer_start = param.value;
break;
case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
dev_priv->tex_lru_log_granularity = param.value;
diff --git a/drivers/char/drm/i915_drv.h b/drivers/char/drm/i915_drv.h
index fd91856..737088b 100644
--- a/drivers/char/drm/i915_drv.h
+++ b/drivers/char/drm/i915_drv.h
@@ -282,6 +282,7 @@ extern int i915_wait_ring(struct drm_device * dev, int n, const char *caller);
#define MI_BATCH_BUFFER_START (0x31<<23)
#define MI_BATCH_BUFFER_END (0xA<<23)
#define MI_BATCH_NON_SECURE (1)
+#define MI_BATCH_NON_SECURE_I965 (1<<8)
#define MI_WAIT_FOR_EVENT ((0x3<<23))
#define MI_WAIT_FOR_PLANE_A_FLIP (1<<2)
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