drm/i915: Extract i915_gem_fence.c
No code changes, just moving all the fence related code into a separate file (and avoiding a bunch of forward declarations while at it). Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
This commit is contained in:
Daniel Vetter
parent
042794b1f4
commit
41a36b739a
4 changed files with 432 additions and 408 deletions
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@ -25,6 +25,7 @@ i915-y += i915_cmd_parser.o \
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i915_gem_dmabuf.o \
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i915_gem_dmabuf.o \
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i915_gem_evict.o \
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i915_gem_evict.o \
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i915_gem_execbuffer.o \
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i915_gem_execbuffer.o \
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i915_gem_fence.o \
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i915_gem_gtt.o \
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i915_gem_gtt.o \
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i915_gem.o \
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i915_gem.o \
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i915_gem_render_state.o \
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i915_gem_render_state.o \
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@ -2868,11 +2868,6 @@ static inline bool i915_gem_request_completed(struct drm_i915_gem_request *req,
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int __must_check i915_gem_get_seqno(struct drm_device *dev, u32 *seqno);
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int __must_check i915_gem_get_seqno(struct drm_device *dev, u32 *seqno);
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int __must_check i915_gem_set_seqno(struct drm_device *dev, u32 seqno);
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int __must_check i915_gem_set_seqno(struct drm_device *dev, u32 seqno);
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int __must_check i915_gem_object_get_fence(struct drm_i915_gem_object *obj);
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int __must_check i915_gem_object_put_fence(struct drm_i915_gem_object *obj);
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bool i915_gem_object_pin_fence(struct drm_i915_gem_object *obj);
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void i915_gem_object_unpin_fence(struct drm_i915_gem_object *obj);
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struct drm_i915_gem_request *
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struct drm_i915_gem_request *
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i915_gem_find_active_request(struct intel_engine_cs *ring);
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i915_gem_find_active_request(struct intel_engine_cs *ring);
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@ -2970,8 +2965,6 @@ struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
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struct dma_buf *i915_gem_prime_export(struct drm_device *dev,
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struct dma_buf *i915_gem_prime_export(struct drm_device *dev,
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struct drm_gem_object *gem_obj, int flags);
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struct drm_gem_object *gem_obj, int flags);
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void i915_gem_restore_fences(struct drm_device *dev);
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unsigned long
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unsigned long
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i915_gem_obj_ggtt_offset_view(struct drm_i915_gem_object *o,
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i915_gem_obj_ggtt_offset_view(struct drm_i915_gem_object *o,
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const struct i915_ggtt_view *view);
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const struct i915_ggtt_view *view);
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@ -3066,6 +3059,15 @@ i915_gem_object_ggtt_unpin(struct drm_i915_gem_object *obj)
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i915_gem_object_ggtt_unpin_view(obj, &i915_ggtt_view_normal);
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i915_gem_object_ggtt_unpin_view(obj, &i915_ggtt_view_normal);
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}
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}
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/* i915_gem_fence.c */
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int __must_check i915_gem_object_get_fence(struct drm_i915_gem_object *obj);
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int __must_check i915_gem_object_put_fence(struct drm_i915_gem_object *obj);
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bool i915_gem_object_pin_fence(struct drm_i915_gem_object *obj);
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void i915_gem_object_unpin_fence(struct drm_i915_gem_object *obj);
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void i915_gem_restore_fences(struct drm_device *dev);
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/* i915_gem_context.c */
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/* i915_gem_context.c */
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int __must_check i915_gem_context_init(struct drm_device *dev);
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int __must_check i915_gem_context_init(struct drm_device *dev);
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void i915_gem_context_fini(struct drm_device *dev);
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void i915_gem_context_fini(struct drm_device *dev);
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@ -46,11 +46,6 @@ static void
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i915_gem_object_retire__write(struct drm_i915_gem_object *obj);
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i915_gem_object_retire__write(struct drm_i915_gem_object *obj);
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static void
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static void
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i915_gem_object_retire__read(struct drm_i915_gem_object *obj, int ring);
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i915_gem_object_retire__read(struct drm_i915_gem_object *obj, int ring);
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static void i915_gem_write_fence(struct drm_device *dev, int reg,
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struct drm_i915_gem_object *obj);
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static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj,
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struct drm_i915_fence_reg *fence,
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bool enable);
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static bool cpu_cache_is_coherent(struct drm_device *dev,
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static bool cpu_cache_is_coherent(struct drm_device *dev,
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enum i915_cache_level level)
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enum i915_cache_level level)
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@ -66,18 +61,6 @@ static bool cpu_write_needs_clflush(struct drm_i915_gem_object *obj)
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return obj->pin_display;
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return obj->pin_display;
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}
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}
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static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object *obj)
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{
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if (obj->tiling_mode)
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i915_gem_release_mmap(obj);
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/* As we do not have an associated fence register, we will force
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* a tiling change if we ever need to acquire one.
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*/
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obj->fence_dirty = false;
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obj->fence_reg = I915_FENCE_REG_NONE;
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}
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/* some bookkeeping */
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/* some bookkeeping */
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static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv,
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static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv,
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size_t size)
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size_t size)
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@ -2793,27 +2776,6 @@ static void i915_gem_reset_ring_cleanup(struct drm_i915_private *dev_priv,
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}
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}
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}
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}
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void i915_gem_restore_fences(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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int i;
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for (i = 0; i < dev_priv->num_fence_regs; i++) {
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struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i];
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/*
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* Commit delayed tiling changes if we have an object still
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* attached to the fence, otherwise just clear the fence.
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*/
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if (reg->obj) {
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i915_gem_object_update_fence(reg->obj, reg,
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reg->obj->tiling_mode);
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} else {
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i915_gem_write_fence(dev, i, NULL);
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}
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}
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}
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void i915_gem_reset(struct drm_device *dev)
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void i915_gem_reset(struct drm_device *dev)
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{
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct drm_i915_private *dev_priv = dev->dev_private;
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@ -3340,343 +3302,6 @@ int i915_gpu_idle(struct drm_device *dev)
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return 0;
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return 0;
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}
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}
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static void i965_write_fence_reg(struct drm_device *dev, int reg,
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struct drm_i915_gem_object *obj)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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int fence_reg;
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int fence_pitch_shift;
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if (INTEL_INFO(dev)->gen >= 6) {
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fence_reg = FENCE_REG_SANDYBRIDGE_0;
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fence_pitch_shift = SANDYBRIDGE_FENCE_PITCH_SHIFT;
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} else {
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fence_reg = FENCE_REG_965_0;
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fence_pitch_shift = I965_FENCE_PITCH_SHIFT;
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}
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fence_reg += reg * 8;
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/* To w/a incoherency with non-atomic 64-bit register updates,
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* we split the 64-bit update into two 32-bit writes. In order
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* for a partial fence not to be evaluated between writes, we
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* precede the update with write to turn off the fence register,
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* and only enable the fence as the last step.
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*
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* For extra levels of paranoia, we make sure each step lands
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* before applying the next step.
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*/
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I915_WRITE(fence_reg, 0);
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POSTING_READ(fence_reg);
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if (obj) {
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u32 size = i915_gem_obj_ggtt_size(obj);
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uint64_t val;
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/* Adjust fence size to match tiled area */
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if (obj->tiling_mode != I915_TILING_NONE) {
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uint32_t row_size = obj->stride *
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(obj->tiling_mode == I915_TILING_Y ? 32 : 8);
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size = (size / row_size) * row_size;
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}
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val = (uint64_t)((i915_gem_obj_ggtt_offset(obj) + size - 4096) &
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0xfffff000) << 32;
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val |= i915_gem_obj_ggtt_offset(obj) & 0xfffff000;
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val |= (uint64_t)((obj->stride / 128) - 1) << fence_pitch_shift;
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if (obj->tiling_mode == I915_TILING_Y)
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val |= 1 << I965_FENCE_TILING_Y_SHIFT;
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val |= I965_FENCE_REG_VALID;
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I915_WRITE(fence_reg + 4, val >> 32);
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POSTING_READ(fence_reg + 4);
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I915_WRITE(fence_reg + 0, val);
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POSTING_READ(fence_reg);
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} else {
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I915_WRITE(fence_reg + 4, 0);
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POSTING_READ(fence_reg + 4);
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}
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}
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static void i915_write_fence_reg(struct drm_device *dev, int reg,
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struct drm_i915_gem_object *obj)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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u32 val;
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if (obj) {
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u32 size = i915_gem_obj_ggtt_size(obj);
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int pitch_val;
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int tile_width;
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WARN((i915_gem_obj_ggtt_offset(obj) & ~I915_FENCE_START_MASK) ||
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(size & -size) != size ||
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(i915_gem_obj_ggtt_offset(obj) & (size - 1)),
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"object 0x%08lx [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n",
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i915_gem_obj_ggtt_offset(obj), obj->map_and_fenceable, size);
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if (obj->tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev))
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tile_width = 128;
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else
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tile_width = 512;
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/* Note: pitch better be a power of two tile widths */
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pitch_val = obj->stride / tile_width;
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pitch_val = ffs(pitch_val) - 1;
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val = i915_gem_obj_ggtt_offset(obj);
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if (obj->tiling_mode == I915_TILING_Y)
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val |= 1 << I830_FENCE_TILING_Y_SHIFT;
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val |= I915_FENCE_SIZE_BITS(size);
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val |= pitch_val << I830_FENCE_PITCH_SHIFT;
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val |= I830_FENCE_REG_VALID;
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} else
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val = 0;
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if (reg < 8)
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reg = FENCE_REG_830_0 + reg * 4;
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else
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reg = FENCE_REG_945_8 + (reg - 8) * 4;
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I915_WRITE(reg, val);
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POSTING_READ(reg);
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}
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static void i830_write_fence_reg(struct drm_device *dev, int reg,
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struct drm_i915_gem_object *obj)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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uint32_t val;
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if (obj) {
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u32 size = i915_gem_obj_ggtt_size(obj);
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uint32_t pitch_val;
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WARN((i915_gem_obj_ggtt_offset(obj) & ~I830_FENCE_START_MASK) ||
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(size & -size) != size ||
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(i915_gem_obj_ggtt_offset(obj) & (size - 1)),
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"object 0x%08lx not 512K or pot-size 0x%08x aligned\n",
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i915_gem_obj_ggtt_offset(obj), size);
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pitch_val = obj->stride / 128;
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pitch_val = ffs(pitch_val) - 1;
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val = i915_gem_obj_ggtt_offset(obj);
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if (obj->tiling_mode == I915_TILING_Y)
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val |= 1 << I830_FENCE_TILING_Y_SHIFT;
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val |= I830_FENCE_SIZE_BITS(size);
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val |= pitch_val << I830_FENCE_PITCH_SHIFT;
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val |= I830_FENCE_REG_VALID;
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} else
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val = 0;
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I915_WRITE(FENCE_REG_830_0 + reg * 4, val);
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POSTING_READ(FENCE_REG_830_0 + reg * 4);
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}
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inline static bool i915_gem_object_needs_mb(struct drm_i915_gem_object *obj)
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{
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return obj && obj->base.read_domains & I915_GEM_DOMAIN_GTT;
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}
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static void i915_gem_write_fence(struct drm_device *dev, int reg,
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struct drm_i915_gem_object *obj)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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/* Ensure that all CPU reads are completed before installing a fence
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* and all writes before removing the fence.
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*/
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if (i915_gem_object_needs_mb(dev_priv->fence_regs[reg].obj))
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mb();
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WARN(obj && (!obj->stride || !obj->tiling_mode),
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"bogus fence setup with stride: 0x%x, tiling mode: %i\n",
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obj->stride, obj->tiling_mode);
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if (IS_GEN2(dev))
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i830_write_fence_reg(dev, reg, obj);
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else if (IS_GEN3(dev))
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i915_write_fence_reg(dev, reg, obj);
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else if (INTEL_INFO(dev)->gen >= 4)
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i965_write_fence_reg(dev, reg, obj);
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/* And similarly be paranoid that no direct access to this region
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* is reordered to before the fence is installed.
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*/
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if (i915_gem_object_needs_mb(obj))
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mb();
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}
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static inline int fence_number(struct drm_i915_private *dev_priv,
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struct drm_i915_fence_reg *fence)
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{
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return fence - dev_priv->fence_regs;
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}
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static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj,
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struct drm_i915_fence_reg *fence,
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bool enable)
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{
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struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
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int reg = fence_number(dev_priv, fence);
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i915_gem_write_fence(obj->base.dev, reg, enable ? obj : NULL);
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if (enable) {
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obj->fence_reg = reg;
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fence->obj = obj;
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list_move_tail(&fence->lru_list, &dev_priv->mm.fence_list);
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} else {
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obj->fence_reg = I915_FENCE_REG_NONE;
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fence->obj = NULL;
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list_del_init(&fence->lru_list);
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}
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obj->fence_dirty = false;
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}
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static int
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i915_gem_object_wait_fence(struct drm_i915_gem_object *obj)
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{
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if (obj->last_fenced_req) {
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int ret = i915_wait_request(obj->last_fenced_req);
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if (ret)
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return ret;
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i915_gem_request_assign(&obj->last_fenced_req, NULL);
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}
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return 0;
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}
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int
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|
||||||
i915_gem_object_put_fence(struct drm_i915_gem_object *obj)
|
|
||||||
{
|
|
||||||
struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
|
|
||||||
struct drm_i915_fence_reg *fence;
|
|
||||||
int ret;
|
|
||||||
|
|
||||||
ret = i915_gem_object_wait_fence(obj);
|
|
||||||
if (ret)
|
|
||||||
return ret;
|
|
||||||
|
|
||||||
if (obj->fence_reg == I915_FENCE_REG_NONE)
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
fence = &dev_priv->fence_regs[obj->fence_reg];
|
|
||||||
|
|
||||||
if (WARN_ON(fence->pin_count))
|
|
||||||
return -EBUSY;
|
|
||||||
|
|
||||||
i915_gem_object_fence_lost(obj);
|
|
||||||
i915_gem_object_update_fence(obj, fence, false);
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static struct drm_i915_fence_reg *
|
|
||||||
i915_find_fence_reg(struct drm_device *dev)
|
|
||||||
{
|
|
||||||
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
||||||
struct drm_i915_fence_reg *reg, *avail;
|
|
||||||
int i;
|
|
||||||
|
|
||||||
/* First try to find a free reg */
|
|
||||||
avail = NULL;
|
|
||||||
for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) {
|
|
||||||
reg = &dev_priv->fence_regs[i];
|
|
||||||
if (!reg->obj)
|
|
||||||
return reg;
|
|
||||||
|
|
||||||
if (!reg->pin_count)
|
|
||||||
avail = reg;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (avail == NULL)
|
|
||||||
goto deadlock;
|
|
||||||
|
|
||||||
/* None available, try to steal one or wait for a user to finish */
|
|
||||||
list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) {
|
|
||||||
if (reg->pin_count)
|
|
||||||
continue;
|
|
||||||
|
|
||||||
return reg;
|
|
||||||
}
|
|
||||||
|
|
||||||
deadlock:
|
|
||||||
/* Wait for completion of pending flips which consume fences */
|
|
||||||
if (intel_has_pending_fb_unpin(dev))
|
|
||||||
return ERR_PTR(-EAGAIN);
|
|
||||||
|
|
||||||
return ERR_PTR(-EDEADLK);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* i915_gem_object_get_fence - set up fencing for an object
|
|
||||||
* @obj: object to map through a fence reg
|
|
||||||
*
|
|
||||||
* When mapping objects through the GTT, userspace wants to be able to write
|
|
||||||
* to them without having to worry about swizzling if the object is tiled.
|
|
||||||
* This function walks the fence regs looking for a free one for @obj,
|
|
||||||
* stealing one if it can't find any.
|
|
||||||
*
|
|
||||||
* It then sets up the reg based on the object's properties: address, pitch
|
|
||||||
* and tiling format.
|
|
||||||
*
|
|
||||||
* For an untiled surface, this removes any existing fence.
|
|
||||||
*/
|
|
||||||
int
|
|
||||||
i915_gem_object_get_fence(struct drm_i915_gem_object *obj)
|
|
||||||
{
|
|
||||||
struct drm_device *dev = obj->base.dev;
|
|
||||||
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
||||||
bool enable = obj->tiling_mode != I915_TILING_NONE;
|
|
||||||
struct drm_i915_fence_reg *reg;
|
|
||||||
int ret;
|
|
||||||
|
|
||||||
/* Have we updated the tiling parameters upon the object and so
|
|
||||||
* will need to serialise the write to the associated fence register?
|
|
||||||
*/
|
|
||||||
if (obj->fence_dirty) {
|
|
||||||
ret = i915_gem_object_wait_fence(obj);
|
|
||||||
if (ret)
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Just update our place in the LRU if our fence is getting reused. */
|
|
||||||
if (obj->fence_reg != I915_FENCE_REG_NONE) {
|
|
||||||
reg = &dev_priv->fence_regs[obj->fence_reg];
|
|
||||||
if (!obj->fence_dirty) {
|
|
||||||
list_move_tail(®->lru_list,
|
|
||||||
&dev_priv->mm.fence_list);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
} else if (enable) {
|
|
||||||
if (WARN_ON(!obj->map_and_fenceable))
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
reg = i915_find_fence_reg(dev);
|
|
||||||
if (IS_ERR(reg))
|
|
||||||
return PTR_ERR(reg);
|
|
||||||
|
|
||||||
if (reg->obj) {
|
|
||||||
struct drm_i915_gem_object *old = reg->obj;
|
|
||||||
|
|
||||||
ret = i915_gem_object_wait_fence(old);
|
|
||||||
if (ret)
|
|
||||||
return ret;
|
|
||||||
|
|
||||||
i915_gem_object_fence_lost(old);
|
|
||||||
}
|
|
||||||
} else
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
i915_gem_object_update_fence(obj, reg, enable);
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
static bool i915_gem_valid_gtt_space(struct i915_vma *vma,
|
static bool i915_gem_valid_gtt_space(struct i915_vma *vma,
|
||||||
unsigned long cache_level)
|
unsigned long cache_level)
|
||||||
{
|
{
|
||||||
|
|
@ -4476,32 +4101,6 @@ i915_gem_object_ggtt_unpin_view(struct drm_i915_gem_object *obj,
|
||||||
--vma->pin_count;
|
--vma->pin_count;
|
||||||
}
|
}
|
||||||
|
|
||||||
bool
|
|
||||||
i915_gem_object_pin_fence(struct drm_i915_gem_object *obj)
|
|
||||||
{
|
|
||||||
if (obj->fence_reg != I915_FENCE_REG_NONE) {
|
|
||||||
struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
|
|
||||||
struct i915_vma *ggtt_vma = i915_gem_obj_to_ggtt(obj);
|
|
||||||
|
|
||||||
WARN_ON(!ggtt_vma ||
|
|
||||||
dev_priv->fence_regs[obj->fence_reg].pin_count >
|
|
||||||
ggtt_vma->pin_count);
|
|
||||||
dev_priv->fence_regs[obj->fence_reg].pin_count++;
|
|
||||||
return true;
|
|
||||||
} else
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
void
|
|
||||||
i915_gem_object_unpin_fence(struct drm_i915_gem_object *obj)
|
|
||||||
{
|
|
||||||
if (obj->fence_reg != I915_FENCE_REG_NONE) {
|
|
||||||
struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
|
|
||||||
WARN_ON(dev_priv->fence_regs[obj->fence_reg].pin_count <= 0);
|
|
||||||
dev_priv->fence_regs[obj->fence_reg].pin_count--;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
int
|
int
|
||||||
i915_gem_busy_ioctl(struct drm_device *dev, void *data,
|
i915_gem_busy_ioctl(struct drm_device *dev, void *data,
|
||||||
struct drm_file *file)
|
struct drm_file *file)
|
||||||
|
|
|
||||||
422
drivers/gpu/drm/i915/i915_gem_fence.c
Normal file
422
drivers/gpu/drm/i915/i915_gem_fence.c
Normal file
|
|
@ -0,0 +1,422 @@
|
||||||
|
/*
|
||||||
|
* Copyright © 2008-2015 Intel Corporation
|
||||||
|
*
|
||||||
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
||||||
|
* copy of this software and associated documentation files (the "Software"),
|
||||||
|
* to deal in the Software without restriction, including without limitation
|
||||||
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
||||||
|
* and/or sell copies of the Software, and to permit persons to whom the
|
||||||
|
* Software is furnished to do so, subject to the following conditions:
|
||||||
|
*
|
||||||
|
* The above copyright notice and this permission notice (including the next
|
||||||
|
* paragraph) shall be included in all copies or substantial portions of the
|
||||||
|
* Software.
|
||||||
|
*
|
||||||
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||||
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||||
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
||||||
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||||
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
||||||
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
||||||
|
* IN THE SOFTWARE.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <drm/drmP.h>
|
||||||
|
#include <drm/i915_drm.h>
|
||||||
|
#include "i915_drv.h"
|
||||||
|
|
||||||
|
static void i965_write_fence_reg(struct drm_device *dev, int reg,
|
||||||
|
struct drm_i915_gem_object *obj)
|
||||||
|
{
|
||||||
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
||||||
|
int fence_reg;
|
||||||
|
int fence_pitch_shift;
|
||||||
|
|
||||||
|
if (INTEL_INFO(dev)->gen >= 6) {
|
||||||
|
fence_reg = FENCE_REG_SANDYBRIDGE_0;
|
||||||
|
fence_pitch_shift = SANDYBRIDGE_FENCE_PITCH_SHIFT;
|
||||||
|
} else {
|
||||||
|
fence_reg = FENCE_REG_965_0;
|
||||||
|
fence_pitch_shift = I965_FENCE_PITCH_SHIFT;
|
||||||
|
}
|
||||||
|
|
||||||
|
fence_reg += reg * 8;
|
||||||
|
|
||||||
|
/* To w/a incoherency with non-atomic 64-bit register updates,
|
||||||
|
* we split the 64-bit update into two 32-bit writes. In order
|
||||||
|
* for a partial fence not to be evaluated between writes, we
|
||||||
|
* precede the update with write to turn off the fence register,
|
||||||
|
* and only enable the fence as the last step.
|
||||||
|
*
|
||||||
|
* For extra levels of paranoia, we make sure each step lands
|
||||||
|
* before applying the next step.
|
||||||
|
*/
|
||||||
|
I915_WRITE(fence_reg, 0);
|
||||||
|
POSTING_READ(fence_reg);
|
||||||
|
|
||||||
|
if (obj) {
|
||||||
|
u32 size = i915_gem_obj_ggtt_size(obj);
|
||||||
|
uint64_t val;
|
||||||
|
|
||||||
|
/* Adjust fence size to match tiled area */
|
||||||
|
if (obj->tiling_mode != I915_TILING_NONE) {
|
||||||
|
uint32_t row_size = obj->stride *
|
||||||
|
(obj->tiling_mode == I915_TILING_Y ? 32 : 8);
|
||||||
|
size = (size / row_size) * row_size;
|
||||||
|
}
|
||||||
|
|
||||||
|
val = (uint64_t)((i915_gem_obj_ggtt_offset(obj) + size - 4096) &
|
||||||
|
0xfffff000) << 32;
|
||||||
|
val |= i915_gem_obj_ggtt_offset(obj) & 0xfffff000;
|
||||||
|
val |= (uint64_t)((obj->stride / 128) - 1) << fence_pitch_shift;
|
||||||
|
if (obj->tiling_mode == I915_TILING_Y)
|
||||||
|
val |= 1 << I965_FENCE_TILING_Y_SHIFT;
|
||||||
|
val |= I965_FENCE_REG_VALID;
|
||||||
|
|
||||||
|
I915_WRITE(fence_reg + 4, val >> 32);
|
||||||
|
POSTING_READ(fence_reg + 4);
|
||||||
|
|
||||||
|
I915_WRITE(fence_reg + 0, val);
|
||||||
|
POSTING_READ(fence_reg);
|
||||||
|
} else {
|
||||||
|
I915_WRITE(fence_reg + 4, 0);
|
||||||
|
POSTING_READ(fence_reg + 4);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static void i915_write_fence_reg(struct drm_device *dev, int reg,
|
||||||
|
struct drm_i915_gem_object *obj)
|
||||||
|
{
|
||||||
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
||||||
|
u32 val;
|
||||||
|
|
||||||
|
if (obj) {
|
||||||
|
u32 size = i915_gem_obj_ggtt_size(obj);
|
||||||
|
int pitch_val;
|
||||||
|
int tile_width;
|
||||||
|
|
||||||
|
WARN((i915_gem_obj_ggtt_offset(obj) & ~I915_FENCE_START_MASK) ||
|
||||||
|
(size & -size) != size ||
|
||||||
|
(i915_gem_obj_ggtt_offset(obj) & (size - 1)),
|
||||||
|
"object 0x%08lx [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n",
|
||||||
|
i915_gem_obj_ggtt_offset(obj), obj->map_and_fenceable, size);
|
||||||
|
|
||||||
|
if (obj->tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev))
|
||||||
|
tile_width = 128;
|
||||||
|
else
|
||||||
|
tile_width = 512;
|
||||||
|
|
||||||
|
/* Note: pitch better be a power of two tile widths */
|
||||||
|
pitch_val = obj->stride / tile_width;
|
||||||
|
pitch_val = ffs(pitch_val) - 1;
|
||||||
|
|
||||||
|
val = i915_gem_obj_ggtt_offset(obj);
|
||||||
|
if (obj->tiling_mode == I915_TILING_Y)
|
||||||
|
val |= 1 << I830_FENCE_TILING_Y_SHIFT;
|
||||||
|
val |= I915_FENCE_SIZE_BITS(size);
|
||||||
|
val |= pitch_val << I830_FENCE_PITCH_SHIFT;
|
||||||
|
val |= I830_FENCE_REG_VALID;
|
||||||
|
} else
|
||||||
|
val = 0;
|
||||||
|
|
||||||
|
if (reg < 8)
|
||||||
|
reg = FENCE_REG_830_0 + reg * 4;
|
||||||
|
else
|
||||||
|
reg = FENCE_REG_945_8 + (reg - 8) * 4;
|
||||||
|
|
||||||
|
I915_WRITE(reg, val);
|
||||||
|
POSTING_READ(reg);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void i830_write_fence_reg(struct drm_device *dev, int reg,
|
||||||
|
struct drm_i915_gem_object *obj)
|
||||||
|
{
|
||||||
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
||||||
|
uint32_t val;
|
||||||
|
|
||||||
|
if (obj) {
|
||||||
|
u32 size = i915_gem_obj_ggtt_size(obj);
|
||||||
|
uint32_t pitch_val;
|
||||||
|
|
||||||
|
WARN((i915_gem_obj_ggtt_offset(obj) & ~I830_FENCE_START_MASK) ||
|
||||||
|
(size & -size) != size ||
|
||||||
|
(i915_gem_obj_ggtt_offset(obj) & (size - 1)),
|
||||||
|
"object 0x%08lx not 512K or pot-size 0x%08x aligned\n",
|
||||||
|
i915_gem_obj_ggtt_offset(obj), size);
|
||||||
|
|
||||||
|
pitch_val = obj->stride / 128;
|
||||||
|
pitch_val = ffs(pitch_val) - 1;
|
||||||
|
|
||||||
|
val = i915_gem_obj_ggtt_offset(obj);
|
||||||
|
if (obj->tiling_mode == I915_TILING_Y)
|
||||||
|
val |= 1 << I830_FENCE_TILING_Y_SHIFT;
|
||||||
|
val |= I830_FENCE_SIZE_BITS(size);
|
||||||
|
val |= pitch_val << I830_FENCE_PITCH_SHIFT;
|
||||||
|
val |= I830_FENCE_REG_VALID;
|
||||||
|
} else
|
||||||
|
val = 0;
|
||||||
|
|
||||||
|
I915_WRITE(FENCE_REG_830_0 + reg * 4, val);
|
||||||
|
POSTING_READ(FENCE_REG_830_0 + reg * 4);
|
||||||
|
}
|
||||||
|
|
||||||
|
inline static bool i915_gem_object_needs_mb(struct drm_i915_gem_object *obj)
|
||||||
|
{
|
||||||
|
return obj && obj->base.read_domains & I915_GEM_DOMAIN_GTT;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void i915_gem_write_fence(struct drm_device *dev, int reg,
|
||||||
|
struct drm_i915_gem_object *obj)
|
||||||
|
{
|
||||||
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
||||||
|
|
||||||
|
/* Ensure that all CPU reads are completed before installing a fence
|
||||||
|
* and all writes before removing the fence.
|
||||||
|
*/
|
||||||
|
if (i915_gem_object_needs_mb(dev_priv->fence_regs[reg].obj))
|
||||||
|
mb();
|
||||||
|
|
||||||
|
WARN(obj && (!obj->stride || !obj->tiling_mode),
|
||||||
|
"bogus fence setup with stride: 0x%x, tiling mode: %i\n",
|
||||||
|
obj->stride, obj->tiling_mode);
|
||||||
|
|
||||||
|
if (IS_GEN2(dev))
|
||||||
|
i830_write_fence_reg(dev, reg, obj);
|
||||||
|
else if (IS_GEN3(dev))
|
||||||
|
i915_write_fence_reg(dev, reg, obj);
|
||||||
|
else if (INTEL_INFO(dev)->gen >= 4)
|
||||||
|
i965_write_fence_reg(dev, reg, obj);
|
||||||
|
|
||||||
|
/* And similarly be paranoid that no direct access to this region
|
||||||
|
* is reordered to before the fence is installed.
|
||||||
|
*/
|
||||||
|
if (i915_gem_object_needs_mb(obj))
|
||||||
|
mb();
|
||||||
|
}
|
||||||
|
|
||||||
|
static inline int fence_number(struct drm_i915_private *dev_priv,
|
||||||
|
struct drm_i915_fence_reg *fence)
|
||||||
|
{
|
||||||
|
return fence - dev_priv->fence_regs;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj,
|
||||||
|
struct drm_i915_fence_reg *fence,
|
||||||
|
bool enable)
|
||||||
|
{
|
||||||
|
struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
|
||||||
|
int reg = fence_number(dev_priv, fence);
|
||||||
|
|
||||||
|
i915_gem_write_fence(obj->base.dev, reg, enable ? obj : NULL);
|
||||||
|
|
||||||
|
if (enable) {
|
||||||
|
obj->fence_reg = reg;
|
||||||
|
fence->obj = obj;
|
||||||
|
list_move_tail(&fence->lru_list, &dev_priv->mm.fence_list);
|
||||||
|
} else {
|
||||||
|
obj->fence_reg = I915_FENCE_REG_NONE;
|
||||||
|
fence->obj = NULL;
|
||||||
|
list_del_init(&fence->lru_list);
|
||||||
|
}
|
||||||
|
obj->fence_dirty = false;
|
||||||
|
}
|
||||||
|
|
||||||
|
static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object *obj)
|
||||||
|
{
|
||||||
|
if (obj->tiling_mode)
|
||||||
|
i915_gem_release_mmap(obj);
|
||||||
|
|
||||||
|
/* As we do not have an associated fence register, we will force
|
||||||
|
* a tiling change if we ever need to acquire one.
|
||||||
|
*/
|
||||||
|
obj->fence_dirty = false;
|
||||||
|
obj->fence_reg = I915_FENCE_REG_NONE;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
i915_gem_object_wait_fence(struct drm_i915_gem_object *obj)
|
||||||
|
{
|
||||||
|
if (obj->last_fenced_req) {
|
||||||
|
int ret = i915_wait_request(obj->last_fenced_req);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
i915_gem_request_assign(&obj->last_fenced_req, NULL);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
i915_gem_object_put_fence(struct drm_i915_gem_object *obj)
|
||||||
|
{
|
||||||
|
struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
|
||||||
|
struct drm_i915_fence_reg *fence;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = i915_gem_object_wait_fence(obj);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
if (obj->fence_reg == I915_FENCE_REG_NONE)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
fence = &dev_priv->fence_regs[obj->fence_reg];
|
||||||
|
|
||||||
|
if (WARN_ON(fence->pin_count))
|
||||||
|
return -EBUSY;
|
||||||
|
|
||||||
|
i915_gem_object_fence_lost(obj);
|
||||||
|
i915_gem_object_update_fence(obj, fence, false);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct drm_i915_fence_reg *
|
||||||
|
i915_find_fence_reg(struct drm_device *dev)
|
||||||
|
{
|
||||||
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
||||||
|
struct drm_i915_fence_reg *reg, *avail;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
/* First try to find a free reg */
|
||||||
|
avail = NULL;
|
||||||
|
for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) {
|
||||||
|
reg = &dev_priv->fence_regs[i];
|
||||||
|
if (!reg->obj)
|
||||||
|
return reg;
|
||||||
|
|
||||||
|
if (!reg->pin_count)
|
||||||
|
avail = reg;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (avail == NULL)
|
||||||
|
goto deadlock;
|
||||||
|
|
||||||
|
/* None available, try to steal one or wait for a user to finish */
|
||||||
|
list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) {
|
||||||
|
if (reg->pin_count)
|
||||||
|
continue;
|
||||||
|
|
||||||
|
return reg;
|
||||||
|
}
|
||||||
|
|
||||||
|
deadlock:
|
||||||
|
/* Wait for completion of pending flips which consume fences */
|
||||||
|
if (intel_has_pending_fb_unpin(dev))
|
||||||
|
return ERR_PTR(-EAGAIN);
|
||||||
|
|
||||||
|
return ERR_PTR(-EDEADLK);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* i915_gem_object_get_fence - set up fencing for an object
|
||||||
|
* @obj: object to map through a fence reg
|
||||||
|
*
|
||||||
|
* When mapping objects through the GTT, userspace wants to be able to write
|
||||||
|
* to them without having to worry about swizzling if the object is tiled.
|
||||||
|
* This function walks the fence regs looking for a free one for @obj,
|
||||||
|
* stealing one if it can't find any.
|
||||||
|
*
|
||||||
|
* It then sets up the reg based on the object's properties: address, pitch
|
||||||
|
* and tiling format.
|
||||||
|
*
|
||||||
|
* For an untiled surface, this removes any existing fence.
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
i915_gem_object_get_fence(struct drm_i915_gem_object *obj)
|
||||||
|
{
|
||||||
|
struct drm_device *dev = obj->base.dev;
|
||||||
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
||||||
|
bool enable = obj->tiling_mode != I915_TILING_NONE;
|
||||||
|
struct drm_i915_fence_reg *reg;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
/* Have we updated the tiling parameters upon the object and so
|
||||||
|
* will need to serialise the write to the associated fence register?
|
||||||
|
*/
|
||||||
|
if (obj->fence_dirty) {
|
||||||
|
ret = i915_gem_object_wait_fence(obj);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Just update our place in the LRU if our fence is getting reused. */
|
||||||
|
if (obj->fence_reg != I915_FENCE_REG_NONE) {
|
||||||
|
reg = &dev_priv->fence_regs[obj->fence_reg];
|
||||||
|
if (!obj->fence_dirty) {
|
||||||
|
list_move_tail(®->lru_list,
|
||||||
|
&dev_priv->mm.fence_list);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
} else if (enable) {
|
||||||
|
if (WARN_ON(!obj->map_and_fenceable))
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
reg = i915_find_fence_reg(dev);
|
||||||
|
if (IS_ERR(reg))
|
||||||
|
return PTR_ERR(reg);
|
||||||
|
|
||||||
|
if (reg->obj) {
|
||||||
|
struct drm_i915_gem_object *old = reg->obj;
|
||||||
|
|
||||||
|
ret = i915_gem_object_wait_fence(old);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
i915_gem_object_fence_lost(old);
|
||||||
|
}
|
||||||
|
} else
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
i915_gem_object_update_fence(obj, reg, enable);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
bool
|
||||||
|
i915_gem_object_pin_fence(struct drm_i915_gem_object *obj)
|
||||||
|
{
|
||||||
|
if (obj->fence_reg != I915_FENCE_REG_NONE) {
|
||||||
|
struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
|
||||||
|
struct i915_vma *ggtt_vma = i915_gem_obj_to_ggtt(obj);
|
||||||
|
|
||||||
|
WARN_ON(!ggtt_vma ||
|
||||||
|
dev_priv->fence_regs[obj->fence_reg].pin_count >
|
||||||
|
ggtt_vma->pin_count);
|
||||||
|
dev_priv->fence_regs[obj->fence_reg].pin_count++;
|
||||||
|
return true;
|
||||||
|
} else
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
i915_gem_object_unpin_fence(struct drm_i915_gem_object *obj)
|
||||||
|
{
|
||||||
|
if (obj->fence_reg != I915_FENCE_REG_NONE) {
|
||||||
|
struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
|
||||||
|
WARN_ON(dev_priv->fence_regs[obj->fence_reg].pin_count <= 0);
|
||||||
|
dev_priv->fence_regs[obj->fence_reg].pin_count--;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void i915_gem_restore_fences(struct drm_device *dev)
|
||||||
|
{
|
||||||
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
for (i = 0; i < dev_priv->num_fence_regs; i++) {
|
||||||
|
struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i];
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Commit delayed tiling changes if we have an object still
|
||||||
|
* attached to the fence, otherwise just clear the fence.
|
||||||
|
*/
|
||||||
|
if (reg->obj) {
|
||||||
|
i915_gem_object_update_fence(reg->obj, reg,
|
||||||
|
reg->obj->tiling_mode);
|
||||||
|
} else {
|
||||||
|
i915_gem_write_fence(dev, i, NULL);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
Add table
Reference in a new issue