[PATCH 12/29] drm/i915: make reset&hangcheck code VM aware

Ben Widawsky
2013-08-01T00:00:43Z

Hangcheck, and some of the recent reset code for guilty batches need to
know which address space the object was in at the time of a hangcheck.
This is because we use offsets in the (PP|G)GTT to determine this
information, and those offsets can differ depending on which VM they are
bound into.

Since we still only have 1 VM ever, this code shouldn't yet any any
impact.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
---
drivers/gpu/drm/i915/i915_gem.c | 30 +++++++++++++++++++++++-------
1 file changed, 23 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index dbf72d5..b4c35f0 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2110,10 +2110,11 @@ i915_gem_request_remove_from_client(struct drm_i915_gem_request *request)
spin_unlock(&file_priv->mm.lock);
}

-static bool i915_head_inside_object(u32 acthd, struct drm_i915_gem_object *obj)
+static bool i915_head_inside_object(u32 acthd, struct drm_i915_gem_object *obj,
+ struct i915_address_space *vm)
{
- if (acthd >= i915_gem_obj_ggtt_offset(obj) &&
- acthd < i915_gem_obj_ggtt_offset(obj) + obj->base.size)
+ if (acthd >= i915_gem_obj_offset(obj, vm) &&
+ acthd < i915_gem_obj_offset(obj, vm) + obj->base.size)
return true;

return false;
@@ -2136,6 +2137,17 @@ static bool i915_head_inside_request(const u32 acthd_unmasked,
return false;
}

+static struct i915_address_space *
+request_to_vm(struct drm_i915_gem_request *request)
+{
+ struct drm_i915_private *dev_priv = request->ring->dev->dev_private;
+ struct i915_address_space *vm;
+
+ vm = &dev_priv->gtt.base;
+
+ return vm;
+}
+
static bool i915_request_guilty(struct drm_i915_gem_request *request,
const u32 acthd, bool *inside)
{
@@ -2143,9 +2155,9 @@ static bool i915_request_guilty(struct drm_i915_gem_request *request,
* pointing inside the ring, matches the batch_obj address range.
* However this is extremely unlikely.
*/
-
if (request->batch_obj) {
- if (i915_head_inside_object(acthd, request->batch_obj)) {
+ if (i915_head_inside_object(acthd, request->batch_obj,
+ request_to_vm(request))) {
*inside = true;
return true;
}
@@ -2165,17 +2177,21 @@ static void i915_set_reset_status(struct intel_ring_buffer *ring,
{
struct i915_ctx_hang_stats *hs = NULL;
bool inside, guilty;
+ unsigned long offset = 0;

/* Innocent until proven guilty */
guilty = false;

+ if (request->batch_obj)
+ offset = i915_gem_obj_offset(request->batch_obj,
+ request_to_vm(request));
+
if (ring->hangcheck.action != wait &&
i915_request_guilty(request, acthd, &inside)) {
DRM_ERROR("%s hung %s bo (0x%lx ctx %d) at 0x%x\n",
ring->name,
inside ? "inside" : "flushing",
- request->batch_obj ?
- i915_gem_obj_ggtt_offset(request->batch_obj) : 0,
+ offset,
request->ctx ? request->ctx->id : 0,
acthd);

--
1.8.3.4