drm/i915: Align "unfenced" tiled access on gen2, early gen3

Old devices have quite severe restrictions for using fences, and unlike
more recent device (anything from Pineview onwards) we need to enforce
those restrictions even for unfenced tiled access from the render
pipeline.

Fixes: 944397f04f24 ("drm/i915: Store required fence size/alignment for GGTT vma")
Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: <drm-intel-fixes@lists.freedesktop.org> # v4.11-rc1+
Link: http://patchwork.freedesktop.org/patch/msgid/20170325113243.16438-1-chris@chris-wilson.co.uk
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2911c49..86f097d 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -853,6 +853,7 @@ struct intel_csr {
        func(has_resource_streamer); \
        func(has_runtime_pm); \
        func(has_snoop); \
+       func(unfenced_needs_alignment); \
        func(cursor_needs_physical); \
        func(hws_needs_physical); \
        func(overlay_needs_physical); \

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index dd7181e..a3e59c8 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -890,6 +890,7 @@ i915_gem_execbuffer_reserve(struct intel_engine_cs *engine,
        struct list_head ordered_vmas;
        struct list_head pinned_vmas;
        bool has_fenced_gpu_access = INTEL_GEN(engine->i915) < 4;
+       bool needs_unfenced_map = INTEL_INFO(engine->i915)->unfenced_needs_alignment;
        int retry;
 
        vm = list_first_entry(vmas, struct i915_vma, exec_list)->vm;
@@ -910,7 +911,8 @@ i915_gem_execbuffer_reserve(struct intel_engine_cs *engine,
                if (!has_fenced_gpu_access)
                        entry->flags &= ~EXEC_OBJECT_NEEDS_FENCE;
                need_fence =
-                       entry->flags & EXEC_OBJECT_NEEDS_FENCE &&
+                       (entry->flags & EXEC_OBJECT_NEEDS_FENCE ||
+                        needs_unfenced_map) &&
                        i915_gem_object_is_tiled(obj);
                need_mappable = need_fence || need_reloc_mappable(vma);
 

diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 732101e..f87b0c4 100644 (file)
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -61,6 +61,7 @@
        .has_overlay = 1, .overlay_needs_physical = 1, \
        .has_gmch_display = 1, \
        .hws_needs_physical = 1, \
+       .unfenced_needs_alignment = 1, \
        .ring_mask = RENDER_RING, \
        GEN_DEFAULT_PIPEOFFSETS, \
        CURSOR_OFFSETS
@@ -102,6 +103,7 @@ static const struct intel_device_info intel_i915g_info = {
        .platform = INTEL_I915G, .cursor_needs_physical = 1,
        .has_overlay = 1, .overlay_needs_physical = 1,
        .hws_needs_physical = 1,
+       .unfenced_needs_alignment = 1,
 };
 
 static const struct intel_device_info intel_i915gm_info = {
@@ -113,6 +115,7 @@ static const struct intel_device_info intel_i915gm_info = {
        .supports_tv = 1,
        .has_fbc = 1,
        .hws_needs_physical = 1,
+       .unfenced_needs_alignment = 1,
 };
 
 static const struct intel_device_info intel_i945g_info = {
@@ -121,6 +124,7 @@ static const struct intel_device_info intel_i945g_info = {
        .has_hotplug = 1, .cursor_needs_physical = 1,
        .has_overlay = 1, .overlay_needs_physical = 1,
        .hws_needs_physical = 1,
+       .unfenced_needs_alignment = 1,
 };
 
 static const struct intel_device_info intel_i945gm_info = {
@@ -131,6 +135,7 @@ static const struct intel_device_info intel_i945gm_info = {
        .supports_tv = 1,
        .has_fbc = 1,
        .hws_needs_physical = 1,
+       .unfenced_needs_alignment = 1,
 };
 
 static const struct intel_device_info intel_g33_info = {