DRM_DEBUG_DRIVER("%s initialization failed [head=%08x], fudging\n",
engine->name, I915_READ_HEAD(engine));
+ /* Check that the ring offsets point within the ring! */
+ GEM_BUG_ON(!intel_ring_offset_valid(ring, ring->head));
+ GEM_BUG_ON(!intel_ring_offset_valid(ring, ring->tail));
+
intel_ring_update_space(ring);
I915_WRITE_HEAD(engine, ring->head);
I915_WRITE_TAIL(engine, ring->tail);
goto out;
}
- intel_engine_init_hangcheck(engine);
-
if (INTEL_GEN(dev_priv) > 2)
I915_WRITE_MODE(engine, _MASKED_BIT_DISABLE(STOP_RING));
return ret;
}
-static void reset_ring_common(struct intel_engine_cs *engine,
- struct i915_request *request)
+static struct i915_request *reset_prepare(struct intel_engine_cs *engine)
{
- /*
- * RC6 must be prevented until the reset is complete and the engine
- * reinitialised. If it occurs in the middle of this sequence, the
- * state written to/loaded from the power context is ill-defined (e.g.
- * the PP_BASE_DIR may be lost).
- */
- assert_forcewakes_active(engine->i915, FORCEWAKE_ALL);
+ intel_engine_stop_cs(engine);
+
+ if (engine->irq_seqno_barrier)
+ engine->irq_seqno_barrier(engine);
+
+ return i915_gem_find_active_request(engine);
+}
+
+static void skip_request(struct i915_request *rq)
+{
+ void *vaddr = rq->ring->vaddr;
+ u32 head;
+
+ head = rq->infix;
+ if (rq->postfix < head) {
+ memset32(vaddr + head, MI_NOOP,
+ (rq->ring->size - head) / sizeof(u32));
+ head = 0;
+ }
+ memset32(vaddr + head, MI_NOOP, (rq->postfix - head) / sizeof(u32));
+}
+
+static void reset_ring(struct intel_engine_cs *engine, struct i915_request *rq)
+{
+ GEM_TRACE("%s seqno=%x\n", engine->name, rq ? rq->global_seqno : 0);
/*
* Try to restore the logical GPU state to match the continuation
* If the request was innocent, we try to replay the request with
* the restored context.
*/
- if (request) {
- struct drm_i915_private *dev_priv = request->i915;
- struct intel_context *ce = to_intel_context(request->ctx,
- engine);
- struct i915_hw_ppgtt *ppgtt;
-
- if (ce->state) {
- I915_WRITE(CCID,
- i915_ggtt_offset(ce->state) |
- BIT(8) /* must be set! */ |
- CCID_EXTENDED_STATE_SAVE |
- CCID_EXTENDED_STATE_RESTORE |
- CCID_EN);
- }
-
- ppgtt = request->ctx->ppgtt ?: engine->i915->mm.aliasing_ppgtt;
- if (ppgtt) {
- u32 pd_offset = ppgtt->pd.base.ggtt_offset << 10;
-
- I915_WRITE(RING_PP_DIR_DCLV(engine), PP_DIR_DCLV_2G);
- I915_WRITE(RING_PP_DIR_BASE(engine), pd_offset);
-
- /* Wait for the PD reload to complete */
- if (intel_wait_for_register(dev_priv,
- RING_PP_DIR_BASE(engine),
- BIT(0), 0,
- 10))
- DRM_ERROR("Wait for reload of ppgtt page-directory timed out\n");
-
- ppgtt->pd_dirty_rings &= ~intel_engine_flag(engine);
- }
-
+ if (rq) {
/* If the rq hung, jump to its breadcrumb and skip the batch */
- if (request->fence.error == -EIO)
- request->ring->head = request->postfix;
- } else {
- engine->legacy_active_context = NULL;
- engine->legacy_active_ppgtt = NULL;
+ rq->ring->head = intel_ring_wrap(rq->ring, rq->head);
+ if (rq->fence.error == -EIO)
+ skip_request(rq);
}
}
+static void reset_finish(struct intel_engine_cs *engine)
+{
+}
+
static int intel_rcs_ctx_init(struct i915_request *rq)
{
int ret;
flags |= PIN_OFFSET_BIAS | offset_bias;
if (vma->obj->stolen)
flags |= PIN_MAPPABLE;
+ else
+ flags |= PIN_HIGH;
if (!(vma->flags & I915_VMA_GLOBAL_BIND)) {
if (flags & PIN_MAPPABLE || map == I915_MAP_WC)
void intel_ring_reset(struct intel_ring *ring, u32 tail)
{
+ GEM_BUG_ON(!intel_ring_offset_valid(ring, tail));
+
ring->tail = tail;
ring->head = tail;
ring->emit = tail;
static struct i915_vma *
intel_ring_create_vma(struct drm_i915_private *dev_priv, int size)
{
+ struct i915_address_space *vm = &dev_priv->ggtt.vm;
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
if (IS_ERR(obj))
return ERR_CAST(obj);
- /* mark ring buffers as read-only from GPU side by default */
- obj->gt_ro = 1;
+ /*
+ * Mark ring buffers as read-only from GPU side (so no stray overwrites)
+ * if supported by the platform's GGTT.
+ */
+ if (vm->has_read_only)
+ i915_gem_object_set_readonly(obj);
- vma = i915_vma_instance(obj, &dev_priv->ggtt.base, NULL);
+ vma = i915_vma_instance(obj, vm, NULL);
if (IS_ERR(vma))
goto err;
kfree(ring);
}
-static int context_pin(struct intel_context *ce)
+static void intel_ring_context_destroy(struct intel_context *ce)
{
- struct i915_vma *vma = ce->state;
- int ret;
+ GEM_BUG_ON(ce->pin_count);
+
+ if (!ce->state)
+ return;
+
+ GEM_BUG_ON(i915_gem_object_is_active(ce->state->obj));
+ i915_gem_object_put(ce->state->obj);
+}
+
+static int __context_pin_ppgtt(struct i915_gem_context *ctx)
+{
+ struct i915_hw_ppgtt *ppgtt;
+ int err = 0;
+
+ ppgtt = ctx->ppgtt ?: ctx->i915->mm.aliasing_ppgtt;
+ if (ppgtt)
+ err = gen6_ppgtt_pin(ppgtt);
+
+ return err;
+}
+
+static void __context_unpin_ppgtt(struct i915_gem_context *ctx)
+{
+ struct i915_hw_ppgtt *ppgtt;
+
+ ppgtt = ctx->ppgtt ?: ctx->i915->mm.aliasing_ppgtt;
+ if (ppgtt)
+ gen6_ppgtt_unpin(ppgtt);
+}
+
+static int __context_pin(struct intel_context *ce)
+{
+ struct i915_vma *vma;
+ int err;
+
+ vma = ce->state;
+ if (!vma)
+ return 0;
/*
* Clear this page out of any CPU caches for coherent swap-in/out.
* on an active context (which by nature is already on the GPU).
*/
if (!(vma->flags & I915_VMA_GLOBAL_BIND)) {
- ret = i915_gem_object_set_to_gtt_domain(vma->obj, true);
- if (ret)
- return ret;
+ err = i915_gem_object_set_to_gtt_domain(vma->obj, true);
+ if (err)
+ return err;
}
- return i915_vma_pin(vma, 0, I915_GTT_MIN_ALIGNMENT,
- PIN_GLOBAL | PIN_HIGH);
+ err = i915_vma_pin(vma, 0, I915_GTT_MIN_ALIGNMENT,
+ PIN_GLOBAL | PIN_HIGH);
+ if (err)
+ return err;
+
+ /*
+ * And mark is as a globally pinned object to let the shrinker know
+ * it cannot reclaim the object until we release it.
+ */
+ vma->obj->pin_global++;
+
+ return 0;
+}
+
+static void __context_unpin(struct intel_context *ce)
+{
+ struct i915_vma *vma;
+
+ vma = ce->state;
+ if (!vma)
+ return;
+
+ vma->obj->pin_global--;
+ i915_vma_unpin(vma);
+}
+
+static void intel_ring_context_unpin(struct intel_context *ce)
+{
+ __context_unpin_ppgtt(ce->gem_context);
+ __context_unpin(ce);
+
+ i915_gem_context_put(ce->gem_context);
}
static struct i915_vma *
i915_gem_object_set_cache_level(obj, I915_CACHE_L3_LLC);
}
- vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
+ vma = i915_vma_instance(obj, &i915->ggtt.vm, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto err_obj;
return ERR_PTR(err);
}
-static struct intel_ring *
-intel_ring_context_pin(struct intel_engine_cs *engine,
- struct i915_gem_context *ctx)
+static struct intel_context *
+__ring_context_pin(struct intel_engine_cs *engine,
+ struct i915_gem_context *ctx,
+ struct intel_context *ce)
{
- struct intel_context *ce = to_intel_context(ctx, engine);
- int ret;
-
- lockdep_assert_held(&ctx->i915->drm.struct_mutex);
-
- if (likely(ce->pin_count++))
- goto out;
- GEM_BUG_ON(!ce->pin_count); /* no overflow please! */
+ int err;
if (!ce->state && engine->context_size) {
struct i915_vma *vma;
vma = alloc_context_vma(engine);
if (IS_ERR(vma)) {
- ret = PTR_ERR(vma);
+ err = PTR_ERR(vma);
goto err;
}
ce->state = vma;
}
- if (ce->state) {
- ret = context_pin(ce);
- if (ret)
- goto err;
+ err = __context_pin(ce);
+ if (err)
+ goto err;
- ce->state->obj->pin_global++;
- }
+ err = __context_pin_ppgtt(ce->gem_context);
+ if (err)
+ goto err_unpin;
i915_gem_context_get(ctx);
-out:
/* One ringbuffer to rule them all */
- return engine->buffer;
+ GEM_BUG_ON(!engine->buffer);
+ ce->ring = engine->buffer;
+
+ return ce;
+err_unpin:
+ __context_unpin(ce);
err:
ce->pin_count = 0;
- return ERR_PTR(ret);
+ return ERR_PTR(err);
}
-static void intel_ring_context_unpin(struct intel_engine_cs *engine,
- struct i915_gem_context *ctx)
+static const struct intel_context_ops ring_context_ops = {
+ .unpin = intel_ring_context_unpin,
+ .destroy = intel_ring_context_destroy,
+};
+
+static struct intel_context *
+intel_ring_context_pin(struct intel_engine_cs *engine,
+ struct i915_gem_context *ctx)
{
struct intel_context *ce = to_intel_context(ctx, engine);
lockdep_assert_held(&ctx->i915->drm.struct_mutex);
- GEM_BUG_ON(ce->pin_count == 0);
- if (--ce->pin_count)
- return;
+ if (likely(ce->pin_count++))
+ return ce;
+ GEM_BUG_ON(!ce->pin_count); /* no overflow please! */
- if (ce->state) {
- ce->state->obj->pin_global--;
- i915_vma_unpin(ce->state);
- }
+ ce->ops = &ring_context_ops;
- i915_gem_context_put(ctx);
+ return __ring_context_pin(engine, ctx, ce);
}
static int intel_init_ring_buffer(struct intel_engine_cs *engine)
{
- struct intel_ring *ring;
struct i915_timeline *timeline;
+ struct intel_ring *ring;
+ unsigned int size;
int err;
intel_engine_setup_common(engine);
- err = intel_engine_init_common(engine);
- if (err)
- goto err;
-
timeline = i915_timeline_create(engine->i915, engine->name);
if (IS_ERR(timeline)) {
err = PTR_ERR(timeline);
GEM_BUG_ON(engine->buffer);
engine->buffer = ring;
+ size = PAGE_SIZE;
+ if (HAS_BROKEN_CS_TLB(engine->i915))
+ size = I830_WA_SIZE;
+ err = intel_engine_create_scratch(engine, size);
+ if (err)
+ goto err_unpin;
+
+ err = intel_engine_init_common(engine);
+ if (err)
+ goto err_scratch;
+
return 0;
+err_scratch:
+ intel_engine_cleanup_scratch(engine);
+err_unpin:
+ intel_ring_unpin(ring);
err_ring:
intel_ring_free(ring);
err:
intel_ring_reset(engine->buffer, 0);
}
+static int load_pd_dir(struct i915_request *rq,
+ const struct i915_hw_ppgtt *ppgtt)
+{
+ const struct intel_engine_cs * const engine = rq->engine;
+ u32 *cs;
+
+ cs = intel_ring_begin(rq, 6);
+ if (IS_ERR(cs))
+ return PTR_ERR(cs);
+
+ *cs++ = MI_LOAD_REGISTER_IMM(1);
+ *cs++ = i915_mmio_reg_offset(RING_PP_DIR_DCLV(engine));
+ *cs++ = PP_DIR_DCLV_2G;
+
+ *cs++ = MI_LOAD_REGISTER_IMM(1);
+ *cs++ = i915_mmio_reg_offset(RING_PP_DIR_BASE(engine));
+ *cs++ = ppgtt->pd.base.ggtt_offset << 10;
+
+ intel_ring_advance(rq, cs);
+
+ return 0;
+}
+
+static int flush_pd_dir(struct i915_request *rq)
+{
+ const struct intel_engine_cs * const engine = rq->engine;
+ u32 *cs;
+
+ cs = intel_ring_begin(rq, 4);
+ if (IS_ERR(cs))
+ return PTR_ERR(cs);
+
+ /* Stall until the page table load is complete */
+ *cs++ = MI_STORE_REGISTER_MEM | MI_SRM_LRM_GLOBAL_GTT;
+ *cs++ = i915_mmio_reg_offset(RING_PP_DIR_BASE(engine));
+ *cs++ = i915_ggtt_offset(engine->scratch);
+ *cs++ = MI_NOOP;
+
+ intel_ring_advance(rq, cs);
+ return 0;
+}
+
static inline int mi_set_context(struct i915_request *rq, u32 flags)
{
struct drm_i915_private *i915 = rq->i915;
(HAS_LEGACY_SEMAPHORES(i915) && IS_GEN7(i915)) ?
INTEL_INFO(i915)->num_rings - 1 :
0;
+ bool force_restore = false;
int len;
u32 *cs;
len = 4;
if (IS_GEN7(i915))
len += 2 + (num_rings ? 4*num_rings + 6 : 0);
+ if (flags & MI_FORCE_RESTORE) {
+ GEM_BUG_ON(flags & MI_RESTORE_INHIBIT);
+ flags &= ~MI_FORCE_RESTORE;
+ force_restore = true;
+ len += 2;
+ }
cs = intel_ring_begin(rq, len);
if (IS_ERR(cs))
}
}
+ if (force_restore) {
+ /*
+ * The HW doesn't handle being told to restore the current
+ * context very well. Quite often it likes goes to go off and
+ * sulk, especially when it is meant to be reloading PP_DIR.
+ * A very simple fix to force the reload is to simply switch
+ * away from the current context and back again.
+ *
+ * Note that the kernel_context will contain random state
+ * following the INHIBIT_RESTORE. We accept this since we
+ * never use the kernel_context state; it is merely a
+ * placeholder we use to flush other contexts.
+ */
+ *cs++ = MI_SET_CONTEXT;
+ *cs++ = i915_ggtt_offset(to_intel_context(i915->kernel_context,
+ engine)->state) |
+ MI_MM_SPACE_GTT |
+ MI_RESTORE_INHIBIT;
+ }
+
*cs++ = MI_NOOP;
*cs++ = MI_SET_CONTEXT;
- *cs++ = i915_ggtt_offset(to_intel_context(rq->ctx, engine)->state) | flags;
+ *cs++ = i915_ggtt_offset(rq->hw_context->state) | flags;
/*
* w/a: MI_SET_CONTEXT must always be followed by MI_NOOP
* WaMiSetContext_Hang:snb,ivb,vlv
static int switch_context(struct i915_request *rq)
{
struct intel_engine_cs *engine = rq->engine;
- struct i915_gem_context *to_ctx = rq->ctx;
- struct i915_hw_ppgtt *to_mm =
- to_ctx->ppgtt ?: rq->i915->mm.aliasing_ppgtt;
- struct i915_gem_context *from_ctx = engine->legacy_active_context;
- struct i915_hw_ppgtt *from_mm = engine->legacy_active_ppgtt;
+ struct i915_gem_context *ctx = rq->gem_context;
+ struct i915_hw_ppgtt *ppgtt = ctx->ppgtt ?: rq->i915->mm.aliasing_ppgtt;
+ unsigned int unwind_mm = 0;
u32 hw_flags = 0;
int ret, i;
lockdep_assert_held(&rq->i915->drm.struct_mutex);
GEM_BUG_ON(HAS_EXECLISTS(rq->i915));
- if (to_mm != from_mm ||
- (to_mm && intel_engine_flag(engine) & to_mm->pd_dirty_rings)) {
- trace_switch_mm(engine, to_ctx);
- ret = to_mm->switch_mm(to_mm, rq);
+ if (ppgtt) {
+ ret = load_pd_dir(rq, ppgtt);
if (ret)
goto err;
- to_mm->pd_dirty_rings &= ~intel_engine_flag(engine);
- engine->legacy_active_ppgtt = to_mm;
- hw_flags = MI_FORCE_RESTORE;
+ if (intel_engine_flag(engine) & ppgtt->pd_dirty_rings) {
+ unwind_mm = intel_engine_flag(engine);
+ ppgtt->pd_dirty_rings &= ~unwind_mm;
+ hw_flags = MI_FORCE_RESTORE;
+ }
}
- if (to_intel_context(to_ctx, engine)->state &&
- (to_ctx != from_ctx || hw_flags & MI_FORCE_RESTORE)) {
+ if (rq->hw_context->state) {
GEM_BUG_ON(engine->id != RCS);
/*
* as nothing actually executes using the kernel context; it
* is purely used for flushing user contexts.
*/
- if (i915_gem_context_is_kernel(to_ctx))
+ if (i915_gem_context_is_kernel(ctx))
hw_flags = MI_RESTORE_INHIBIT;
ret = mi_set_context(rq, hw_flags);
if (ret)
goto err_mm;
+ }
- engine->legacy_active_context = to_ctx;
+ if (ppgtt) {
+ ret = flush_pd_dir(rq);
+ if (ret)
+ goto err_mm;
}
- if (to_ctx->remap_slice) {
+ if (ctx->remap_slice) {
for (i = 0; i < MAX_L3_SLICES; i++) {
- if (!(to_ctx->remap_slice & BIT(i)))
+ if (!(ctx->remap_slice & BIT(i)))
continue;
ret = remap_l3(rq, i);
if (ret)
- goto err_ctx;
+ goto err_mm;
}
- to_ctx->remap_slice = 0;
+ ctx->remap_slice = 0;
}
return 0;
-err_ctx:
- engine->legacy_active_context = from_ctx;
err_mm:
- engine->legacy_active_ppgtt = from_mm;
+ if (unwind_mm)
+ ppgtt->pd_dirty_rings |= unwind_mm;
err:
return ret;
}
{
int ret;
- GEM_BUG_ON(!to_intel_context(request->ctx, request->engine)->pin_count);
+ GEM_BUG_ON(!request->hw_context->pin_count);
/* Flush enough space to reduce the likelihood of waiting after
* we start building the request - in which case we will just
intel_ring_init_semaphores(dev_priv, engine);
engine->init_hw = init_ring_common;
- engine->reset_hw = reset_ring_common;
+ engine->reset.prepare = reset_prepare;
+ engine->reset.reset = reset_ring;
+ engine->reset.finish = reset_finish;
engine->context_pin = intel_ring_context_pin;
- engine->context_unpin = intel_ring_context_unpin;
-
engine->request_alloc = ring_request_alloc;
engine->emit_breadcrumb = i9xx_emit_breadcrumb;
if (ret)
return ret;
- if (INTEL_GEN(dev_priv) >= 6) {
- ret = intel_engine_create_scratch(engine, PAGE_SIZE);
- if (ret)
- return ret;
- } else if (HAS_BROKEN_CS_TLB(dev_priv)) {
- ret = intel_engine_create_scratch(engine, I830_WA_SIZE);
- if (ret)
- return ret;
- }
-
return 0;
}
projects / platform / kernel / linux-rpi.git / blobdiff