[PATCH 2/8] drm/i915/gem: Include PIN_GLOBAL prior to using I915_DISPATCH_SECURE

[Chris Wilson]

For our gpu relocs, on the older gen 4 and 5 devices, we must use a
privileged buffer for MI_STORE_DWORD_IMM. This also presumes that we
operate from the global GTT, for consistency we should tell
i915_vma_pin() that it will be used with the global address. While there
is only the single GTT available for these devices, so it does not change
the actual GTT used for pinning.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 517898aa634c..797acc54f718 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -1197,6 +1197,7 @@ static int __reloc_gpu_alloc(struct i915_execbuffer *eb,
 	struct intel_engine_pool_node *pool;
 	struct i915_request *rq;
 	struct i915_vma *batch;
+	u32 flags;
 	u32 *cmd;
 	int err;
 
@@ -1219,7 +1220,11 @@ static int __reloc_gpu_alloc(struct i915_execbuffer *eb,
 		goto err_unmap;
 	}
 
-	err = i915_vma_pin(batch, 0, 0, PIN_USER | PIN_NONBLOCK);
+	flags = PIN_USER | PIN_NOEVICT | PIN_NONBLOCK;
+	if (cache->gen <= 5)
+		flags |= PIN_GLOBAL;
+
+	err = i915_vma_pin(batch, 0, 0, flags);
 	if (err)
 		goto err_unmap;
 
@@ -1239,7 +1244,8 @@ static int __reloc_gpu_alloc(struct i915_execbuffer *eb,
 
 	err = eb->engine->emit_bb_start(rq,
 					batch->node.start, PAGE_SIZE,
-					cache->gen > 5 ? 0 : I915_DISPATCH_SECURE);
+					flags & PIN_GLOBAL ?
+					I915_DISPATCH_SECURE : 0);
 	if (err)
 		goto skip_request;
 
-- 
2.20.1