[Intel-gfx] [PATCH v2 2/2] drm/i915: add in-kernel blitter client
Matthew Auld
matthew.auld at intel.com
Tue May 7 10:55:57 UTC 2019
The plan is to use the blitter engine for async object clearing when
using local memory, but before we can move the worker to get_pages() we
have to first tame some more of our struct_mutex usage. With this in
mind we should be able to upstream the object clearing as some
selftests, which should serve as a guinea pig for the ongoing locking
rework and upcoming asyc get_pages() framework.
Signed-off-by: Matthew Auld <matthew.auld at intel.com>
---
drivers/gpu/drm/i915/Makefile | 2 +
drivers/gpu/drm/i915/gt/intel_gpu_commands.h | 1 +
drivers/gpu/drm/i915/i915_gem_client_blt.c | 297 ++++++++++++++++++
drivers/gpu/drm/i915/i915_gem_client_blt.h | 21 ++
drivers/gpu/drm/i915/i915_gem_object_blt.c | 103 ++++++
drivers/gpu/drm/i915/i915_gem_object_blt.h | 24 ++
.../drm/i915/selftests/i915_gem_client_blt.c | 131 ++++++++
.../drm/i915/selftests/i915_gem_object_blt.c | 114 +++++++
.../drm/i915/selftests/i915_live_selftests.h | 2 +
9 files changed, 695 insertions(+)
create mode 100644 drivers/gpu/drm/i915/i915_gem_client_blt.c
create mode 100644 drivers/gpu/drm/i915/i915_gem_client_blt.h
create mode 100644 drivers/gpu/drm/i915/i915_gem_object_blt.c
create mode 100644 drivers/gpu/drm/i915/i915_gem_object_blt.h
create mode 100644 drivers/gpu/drm/i915/selftests/i915_gem_client_blt.c
create mode 100644 drivers/gpu/drm/i915/selftests/i915_gem_object_blt.c
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 68106fe35a04..a1690aade273 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -90,6 +90,7 @@ i915-y += \
i915_cmd_parser.o \
i915_gem_batch_pool.o \
i915_gem_clflush.o \
+ i915_gem_client_blt.o \
i915_gem_context.o \
i915_gem_dmabuf.o \
i915_gem_evict.o \
@@ -99,6 +100,7 @@ i915-y += \
i915_gem_internal.o \
i915_gem.o \
i915_gem_object.o \
+ i915_gem_object_blt.o \
i915_gem_pm.o \
i915_gem_render_state.o \
i915_gem_shrinker.o \
diff --git a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
index a34ece53a771..7e95827b0726 100644
--- a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
+++ b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
@@ -180,6 +180,7 @@
#define GFX_OP_DRAWRECT_INFO_I965 ((0x7900<<16)|0x2)
#define COLOR_BLT_CMD (2<<29 | 0x40<<22 | (5-2))
+#define XY_COLOR_BLT_CMD (2<<29 | 0x50<<22)
#define SRC_COPY_BLT_CMD ((2<<29)|(0x43<<22)|4)
#define XY_SRC_COPY_BLT_CMD ((2<<29)|(0x53<<22)|6)
#define XY_MONO_SRC_COPY_IMM_BLT ((2<<29)|(0x71<<22)|5)
diff --git a/drivers/gpu/drm/i915/i915_gem_client_blt.c b/drivers/gpu/drm/i915/i915_gem_client_blt.c
new file mode 100644
index 000000000000..0a25df8d567a
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_gem_client_blt.c
@@ -0,0 +1,297 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+#include "i915_gem_client_blt.h"
+
+#include "i915_gem_object_blt.h"
+#include "intel_drv.h"
+
+struct i915_sleeve {
+ struct i915_vma *vma;
+ struct drm_i915_gem_object *obj;
+ struct sg_table *pages;
+ struct i915_page_sizes page_sizes;
+};
+
+static int vma_set_pages(struct i915_vma *vma)
+{
+ struct i915_sleeve *sleeve = vma->private;
+
+ vma->pages = sleeve->pages;
+ vma->page_sizes = sleeve->page_sizes;
+
+ return 0;
+}
+
+static void vma_clear_pages(struct i915_vma *vma)
+{
+ GEM_BUG_ON(!vma->pages);
+ vma->pages = NULL;
+}
+
+static int vma_bind(struct i915_vma *vma,
+ enum i915_cache_level cache_level,
+ u32 flags)
+{
+ return vma->vm->vma_ops.bind_vma(vma, cache_level, flags);
+}
+
+static void vma_unbind(struct i915_vma *vma)
+{
+ vma->vm->vma_ops.unbind_vma(vma);
+}
+
+static const struct i915_vma_ops proxy_vma_ops = {
+ .set_pages = vma_set_pages,
+ .clear_pages = vma_clear_pages,
+ .bind_vma = vma_bind,
+ .unbind_vma = vma_unbind,
+};
+
+static struct i915_sleeve *create_sleeve(struct i915_address_space *vm,
+ struct drm_i915_gem_object *obj,
+ struct sg_table *pages,
+ struct i915_page_sizes *page_sizes)
+{
+ struct i915_sleeve *sleeve;
+ struct i915_vma *vma;
+ int err;
+
+ sleeve = kzalloc(sizeof(*sleeve), GFP_KERNEL);
+ if (!sleeve)
+ return ERR_PTR(-ENOMEM);
+
+ vma = i915_vma_instance(obj, vm, NULL);
+ if (IS_ERR(vma)) {
+ err = PTR_ERR(vma);
+ goto err_free;
+ }
+
+ vma->private = sleeve;
+ vma->ops = &proxy_vma_ops;
+
+ sleeve->vma = vma;
+ sleeve->obj = i915_gem_object_get(obj);
+ sleeve->pages = pages;
+ sleeve->page_sizes = *page_sizes;
+
+ return sleeve;
+
+err_free:
+ kfree(sleeve);
+ return ERR_PTR(err);
+}
+
+static void destroy_sleeve(struct i915_sleeve *sleeve)
+{
+ i915_gem_object_put(sleeve->obj);
+ kfree(sleeve);
+}
+
+struct clear_pages_work {
+ struct dma_fence dma;
+ struct dma_fence_cb cb;
+ struct i915_sw_fence wait;
+ struct work_struct work;
+ struct irq_work irq_work;
+ struct i915_sleeve *sleeve;
+ struct intel_context *ce;
+ u32 value;
+};
+
+static const char *clear_pages_work_driver_name(struct dma_fence *fence)
+{
+ return DRIVER_NAME;
+}
+
+static const char *clear_pages_work_timeline_name(struct dma_fence *fence)
+{
+ return "clear";
+}
+
+static void clear_pages_work_release(struct dma_fence *fence)
+{
+ struct clear_pages_work *w = container_of(fence, typeof(*w), dma);
+
+ destroy_sleeve(w->sleeve);
+
+ i915_sw_fence_fini(&w->wait);
+
+ BUILD_BUG_ON(offsetof(typeof(*w), dma));
+ dma_fence_free(&w->dma);
+}
+
+static const struct dma_fence_ops clear_pages_work_ops = {
+ .get_driver_name = clear_pages_work_driver_name,
+ .get_timeline_name = clear_pages_work_timeline_name,
+ .release = clear_pages_work_release,
+};
+
+static void clear_pages_signal_irq_worker(struct irq_work *work)
+{
+ struct clear_pages_work *w = container_of(work, typeof(*w), irq_work);
+
+ dma_fence_signal(&w->dma);
+ dma_fence_put(&w->dma);
+}
+
+static void clear_pages_dma_fence_cb(struct dma_fence *fence,
+ struct dma_fence_cb *cb)
+{
+ struct clear_pages_work *w = container_of(cb, typeof(*w), cb);
+
+ /*
+ * Push the signalling of the fence into yet another worker to avoid
+ * the nightmare locking around the fence spinlock.
+ */
+ irq_work_queue(&w->irq_work);
+}
+
+static void clear_pages_worker(struct work_struct *work)
+{
+ struct clear_pages_work *w = container_of(work, typeof(*w), work);
+ struct drm_i915_private *i915 = w->ce->gem_context->i915;
+ struct drm_i915_gem_object *obj = w->sleeve->obj;
+ struct i915_vma *vma = w->sleeve->vma;
+ struct i915_request *rq;
+ int err;
+
+ if (w->dma.error)
+ goto out_signal;
+
+ if (obj->cache_dirty) {
+ obj->write_domain = 0;
+ if (i915_gem_object_has_struct_page(obj))
+ drm_clflush_sg(w->sleeve->pages);
+ obj->cache_dirty = false;
+ }
+
+ mutex_lock(&i915->drm.struct_mutex);
+ err = i915_vma_pin(vma, 0, 0, PIN_USER);
+ if (unlikely(err)) {
+ mutex_unlock(&i915->drm.struct_mutex);
+ dma_fence_set_error(&w->dma, err);
+ goto out_signal;
+ }
+
+ rq = i915_request_create(w->ce);
+ if (IS_ERR(rq)) {
+ err = PTR_ERR(rq);
+ goto out_unpin;
+ }
+
+ err = intel_emit_vma_fill_blt(rq, vma, w->value);
+ if (unlikely(err))
+ goto out_request;
+
+ err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE);
+out_request:
+ if (unlikely(err))
+ i915_request_skip(rq, err);
+ else
+ i915_request_get(rq);
+
+ i915_request_add(rq);
+out_unpin:
+ i915_vma_unpin(vma);
+
+ mutex_unlock(&i915->drm.struct_mutex);
+
+ if (!err) {
+ err = dma_fence_add_callback(&rq->fence, &w->cb,
+ clear_pages_dma_fence_cb);
+ i915_request_put(rq);
+ if (!err)
+ return;
+ } else {
+ dma_fence_set_error(&w->dma, err);
+ }
+out_signal:
+ dma_fence_signal(&w->dma);
+ dma_fence_put(&w->dma);
+}
+
+static int __i915_sw_fence_call
+clear_pages_work_notify(struct i915_sw_fence *fence,
+ enum i915_sw_fence_notify state)
+{
+ struct clear_pages_work *w = container_of(fence, typeof(*w), wait);
+
+ switch (state) {
+ case FENCE_COMPLETE:
+ schedule_work(&w->work);
+ break;
+
+ case FENCE_FREE:
+ dma_fence_put(&w->dma);
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static DEFINE_SPINLOCK(fence_lock);
+
+int i915_gem_schedule_fill_pages_blt(struct drm_i915_gem_object *obj,
+ struct intel_context *ce,
+ struct sg_table *pages,
+ struct i915_page_sizes *page_sizes,
+ u32 value)
+{
+ struct drm_i915_private *i915 = to_i915(obj->base.dev);
+ struct i915_gem_context *ctx = ce->gem_context;
+ struct i915_address_space *vm;
+ struct clear_pages_work *work;
+ struct i915_sleeve *sleeve;
+ int err;
+
+ vm = ctx->ppgtt ? &ctx->ppgtt->vm : &i915->ggtt.vm;
+
+ sleeve = create_sleeve(vm, obj, pages, page_sizes);
+ if (IS_ERR(sleeve))
+ return PTR_ERR(sleeve);
+
+ work = kmalloc(sizeof(*work), GFP_KERNEL);
+ if (work == NULL) {
+ destroy_sleeve(sleeve);
+ return -ENOMEM;
+ }
+
+ work->value = value;
+ work->sleeve = sleeve;
+ work->ce = ce;
+
+ INIT_WORK(&work->work, clear_pages_worker);
+
+ init_irq_work(&work->irq_work, clear_pages_signal_irq_worker);
+
+ dma_fence_init(&work->dma,
+ &clear_pages_work_ops,
+ &fence_lock,
+ i915->mm.unordered_timeline,
+ 0);
+ i915_sw_fence_init(&work->wait, clear_pages_work_notify);
+
+ i915_gem_object_lock(obj);
+ err = i915_sw_fence_await_reservation(&work->wait,
+ obj->resv, NULL,
+ true, I915_FENCE_TIMEOUT,
+ I915_FENCE_GFP);
+ if (err < 0) {
+ dma_fence_set_error(&work->dma, err);
+ } else {
+ reservation_object_add_excl_fence(obj->resv, &work->dma);
+ err = 0;
+ }
+ i915_gem_object_unlock(obj);
+
+ dma_fence_get(&work->dma);
+ i915_sw_fence_commit(&work->wait);
+
+ return err;
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
+#include "selftests/i915_gem_client_blt.c"
+#endif
diff --git a/drivers/gpu/drm/i915/i915_gem_client_blt.h b/drivers/gpu/drm/i915/i915_gem_client_blt.h
new file mode 100644
index 000000000000..a7080623e741
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_gem_client_blt.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+#ifndef __I915_GEM_CLIENT_BLT_H__
+#define __I915_GEM_CLIENT_BLT_H__
+
+#include <linux/types.h>
+
+struct drm_i915_gem_object;
+struct intel_context ce;
+struct i915_page_sizes;
+struct sg_table;
+
+int i915_gem_schedule_fill_pages_blt(struct drm_i915_gem_object *obj,
+ struct intel_context *ce,
+ struct sg_table *pages,
+ struct i915_page_sizes *page_sizes,
+ u32 value);
+
+#endif
diff --git a/drivers/gpu/drm/i915/i915_gem_object_blt.c b/drivers/gpu/drm/i915/i915_gem_object_blt.c
new file mode 100644
index 000000000000..3fda33e5dcf5
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_gem_object_blt.c
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include "i915_gem_object_blt.h"
+
+#include "i915_gem_clflush.h"
+#include "intel_drv.h"
+
+int intel_emit_vma_fill_blt(struct i915_request *rq,
+ struct i915_vma *vma,
+ u32 value)
+{
+ struct intel_context *ce = rq->hw_context;
+ u32 *cs;
+ int err;
+
+ if (ce->engine->emit_init_breadcrumb) {
+ err = ce->engine->emit_init_breadcrumb(rq);
+ if (unlikely(err))
+ return err;
+ }
+
+ cs = intel_ring_begin(rq, 8);
+
+ if (INTEL_GEN(rq->i915) >= 8) {
+ *cs++ = XY_COLOR_BLT_CMD | BLT_WRITE_RGBA | (7-2);
+ *cs++ = BLT_DEPTH_32 | BLT_ROP_COLOR_COPY | PAGE_SIZE;
+ *cs++ = 0;
+ *cs++ = vma->size >> PAGE_SHIFT << 16 | PAGE_SIZE / 4;
+ *cs++ = lower_32_bits(vma->node.start);
+ *cs++ = upper_32_bits(vma->node.start);
+ *cs++ = value;
+ *cs++ = MI_NOOP;
+ } else {
+ *cs++ = XY_COLOR_BLT_CMD | BLT_WRITE_RGBA | (6-2);
+ *cs++ = BLT_DEPTH_32 | BLT_ROP_COLOR_COPY | PAGE_SIZE;
+ *cs++ = 0;
+ *cs++ = vma->size >> PAGE_SHIFT << 16 | PAGE_SIZE / 4;
+ *cs++ = vma->node.start;
+ *cs++ = value;
+ *cs++ = MI_NOOP;
+ *cs++ = MI_NOOP;
+ }
+
+ intel_ring_advance(rq, cs);
+
+ return 0;
+}
+
+int i915_gem_object_fill_blt(struct drm_i915_gem_object *obj,
+ struct intel_context *ce,
+ u32 value)
+{
+ struct drm_i915_private *i915 = to_i915(obj->base.dev);
+ struct i915_gem_context *ctx = ce->gem_context;
+ struct i915_address_space *vm;
+ struct i915_request *rq;
+ struct i915_vma *vma;
+ int err;
+
+ vm = ctx->ppgtt ? &ctx->ppgtt->vm : &i915->ggtt.vm;
+
+ vma = i915_vma_instance(obj, vm, NULL);
+ if (IS_ERR(vma))
+ return PTR_ERR(vma);
+
+ err = i915_vma_pin(vma, 0, 0, PIN_USER);
+ if (unlikely(err))
+ return err;
+
+ if (obj->cache_dirty)
+ i915_gem_clflush_object(obj, 0);
+
+ rq = i915_request_create(ce);
+ if (IS_ERR(rq)) {
+ err = PTR_ERR(rq);
+ goto out_unpin;
+ }
+
+ err = i915_request_await_object(rq, obj, true);
+ if (unlikely(err))
+ goto out_request;
+
+ err = intel_emit_vma_fill_blt(rq, vma, value);
+ if (unlikely(err))
+ goto out_request;
+
+ err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE);
+out_request:
+ if (unlikely(err))
+ i915_request_skip(rq, err);
+
+ i915_request_add(rq);
+out_unpin:
+ i915_vma_unpin(vma);
+ return err;
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
+#include "selftests/i915_gem_object_blt.c"
+#endif
diff --git a/drivers/gpu/drm/i915/i915_gem_object_blt.h b/drivers/gpu/drm/i915/i915_gem_object_blt.h
new file mode 100644
index 000000000000..7ec7de6ac0c0
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_gem_object_blt.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __I915_GEM_OBJECT_BLT_H__
+#define __I915_GEM_OBJECT_BLT_H__
+
+#include <linux/types.h>
+
+struct drm_i915_gem_object;
+struct intel_context;
+struct i915_request;
+struct i915_vma;
+
+int intel_emit_vma_fill_blt(struct i915_request *rq,
+ struct i915_vma *vma,
+ u32 value);
+
+int i915_gem_object_fill_blt(struct drm_i915_gem_object *obj,
+ struct intel_context *ce,
+ u32 value);
+
+#endif
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_client_blt.c b/drivers/gpu/drm/i915/selftests/i915_gem_client_blt.c
new file mode 100644
index 000000000000..54b15d22e310
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_client_blt.c
@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include "../i915_selftest.h"
+
+#include "igt_flush_test.h"
+#include "mock_drm.h"
+#include "mock_context.h"
+
+static int igt_client_fill(void *arg)
+{
+ struct intel_context *ce = arg;
+ struct drm_i915_private *i915 = ce->gem_context->i915;
+ struct drm_i915_gem_object *obj;
+ struct rnd_state prng;
+ IGT_TIMEOUT(end);
+ u32 *vaddr;
+ int err = 0;
+
+ prandom_seed_state(&prng, i915_selftest.random_seed);
+
+ do {
+ u32 sz = prandom_u32_state(&prng) % SZ_32M;
+ u32 val = prandom_u32_state(&prng);
+ u32 i;
+
+ sz = round_up(sz, PAGE_SIZE);
+
+ pr_info("%s with sz=%x, val=%x\n", __func__, sz, val);
+
+ obj = i915_gem_object_create_internal(i915, sz);
+ if (IS_ERR(obj)) {
+ err = PTR_ERR(obj);
+ goto err_flush;
+ }
+
+ vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB);
+ if (IS_ERR(vaddr)) {
+ err = PTR_ERR(vaddr);
+ goto err_put;
+ }
+
+ /*
+ * XXX: The goal is move this to get_pages, so try to dirty the
+ * CPU cache first to check that we do the required clflush
+ * before scheduling the blt for !llc platforms. This matches
+ * some version of reality where at get_pages the pages
+ * themselves may not yet be coherent with the GPU(swap-in). If
+ * we are missing the flush then we should see the stale cache
+ * values after we do the set_to_cpu_domain and pick it up as a
+ * test failure.
+ */
+ memset32(vaddr, val ^ 0xdeadbeaf, obj->base.size / sizeof(u32));
+
+ if (!(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE))
+ obj->cache_dirty = true;
+
+ err = i915_gem_schedule_fill_pages_blt(obj, ce, obj->mm.pages,
+ &obj->mm.page_sizes,
+ val);
+ if (err)
+ goto err_unpin;
+
+ /*
+ * XXX: For now do the wait without the BKL to ensure we don't
+ * deadlock.
+ */
+ err = i915_gem_object_wait(obj,
+ I915_WAIT_INTERRUPTIBLE |
+ I915_WAIT_ALL,
+ MAX_SCHEDULE_TIMEOUT);
+ if (err)
+ goto err_unpin;
+
+ mutex_lock(&i915->drm.struct_mutex);
+ err = i915_gem_object_set_to_cpu_domain(obj, false);
+ mutex_unlock(&i915->drm.struct_mutex);
+ if (err)
+ goto err_unpin;
+
+ for (i = 0; i < obj->base.size / sizeof(u32); ++i) {
+ if (vaddr[i] != val) {
+ pr_err("vaddr[%u]=%x, expected=%x\n", i,
+ vaddr[i], val);
+ err = -EINVAL;
+ goto err_unpin;
+ }
+ }
+
+ i915_gem_object_unpin_map(obj);
+
+ mutex_lock(&i915->drm.struct_mutex);
+ __i915_gem_object_release_unless_active(obj);
+ mutex_unlock(&i915->drm.struct_mutex);
+ } while (!time_after(jiffies, end));
+
+ goto err_flush;
+
+err_unpin:
+ i915_gem_object_unpin_map(obj);
+err_put:
+ mutex_lock(&i915->drm.struct_mutex);
+ __i915_gem_object_release_unless_active(obj);
+ mutex_unlock(&i915->drm.struct_mutex);
+err_flush:
+ mutex_lock(&i915->drm.struct_mutex);
+ igt_flush_test(i915, I915_WAIT_LOCKED);
+ mutex_unlock(&i915->drm.struct_mutex);
+
+ if (err == -ENOMEM)
+ err = 0;
+
+ return err;
+}
+
+int i915_gem_client_blt_live_selftests(struct drm_i915_private *i915)
+{
+ static const struct i915_subtest tests[] = {
+ SUBTEST(igt_client_fill),
+ };
+
+ if (i915_terminally_wedged(i915))
+ return 0;
+
+ if (!HAS_ENGINE(i915, BCS0))
+ return 0;
+
+ return i915_subtests(tests, i915->engine[BCS0]->kernel_context);
+}
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_object_blt.c b/drivers/gpu/drm/i915/selftests/i915_gem_object_blt.c
new file mode 100644
index 000000000000..9216f24c7c8f
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_object_blt.c
@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include "../i915_selftest.h"
+
+#include "igt_flush_test.h"
+#include "mock_drm.h"
+#include "mock_context.h"
+
+static int igt_fill_blt(void *arg)
+{
+ struct intel_context *ce = arg;
+ struct drm_i915_private *i915 = ce->gem_context->i915;
+ struct drm_i915_gem_object *obj;
+ struct rnd_state prng;
+ IGT_TIMEOUT(end);
+ u32 *vaddr;
+ int err = 0;
+
+ prandom_seed_state(&prng, i915_selftest.random_seed);
+
+ do {
+ u32 sz = prandom_u32_state(&prng) % SZ_32M;
+ u32 val = prandom_u32_state(&prng);
+ u32 i;
+
+ sz = round_up(sz, PAGE_SIZE);
+
+ pr_info("%s with sz=%x, val=%x\n", __func__, sz, val);
+
+ obj = i915_gem_object_create_internal(i915, sz);
+ if (IS_ERR(obj)) {
+ err = PTR_ERR(vaddr);
+ goto err_flush;
+ }
+
+ vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB);
+ if (IS_ERR(vaddr)) {
+ err = PTR_ERR(vaddr);
+ goto err_put;
+ }
+
+ /*
+ * Make sure the potentially async clflush does its job, if
+ * required.
+ */
+ memset32(vaddr, val ^ 0xdeadbeaf, obj->base.size / sizeof(u32));
+
+ if (!(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE))
+ obj->cache_dirty = true;
+
+ mutex_lock(&i915->drm.struct_mutex);
+ err = i915_gem_object_fill_blt(obj, ce, val);
+ mutex_unlock(&i915->drm.struct_mutex);
+ if (err)
+ goto err_unpin;
+
+ mutex_lock(&i915->drm.struct_mutex);
+ err = i915_gem_object_set_to_cpu_domain(obj, false);
+ mutex_unlock(&i915->drm.struct_mutex);
+ if (err)
+ goto err_unpin;
+
+ for (i = 0; i < obj->base.size / sizeof(u32); ++i) {
+ if (vaddr[i] != val) {
+ pr_err("vaddr[%u]=%x, expected=%x\n", i,
+ vaddr[i], val);
+ err = -EINVAL;
+ goto err_unpin;
+ }
+ }
+
+ i915_gem_object_unpin_map(obj);
+
+ mutex_lock(&i915->drm.struct_mutex);
+ __i915_gem_object_release_unless_active(obj);
+ mutex_unlock(&i915->drm.struct_mutex);
+ } while (!time_after(jiffies, end));
+
+ goto err_flush;
+
+err_unpin:
+ i915_gem_object_unpin_map(obj);
+err_put:
+ mutex_lock(&i915->drm.struct_mutex);
+ __i915_gem_object_release_unless_active(obj);
+ mutex_unlock(&i915->drm.struct_mutex);
+err_flush:
+ mutex_lock(&i915->drm.struct_mutex);
+ igt_flush_test(i915, I915_WAIT_LOCKED);
+ mutex_unlock(&i915->drm.struct_mutex);
+
+ if (err == -ENOMEM)
+ err = 0;
+
+ return err;
+}
+
+int i915_gem_object_blt_live_selftests(struct drm_i915_private *i915)
+{
+ static const struct i915_subtest tests[] = {
+ SUBTEST(igt_fill_blt),
+ };
+
+ if (i915_terminally_wedged(i915))
+ return 0;
+
+ if (!HAS_ENGINE(i915, BCS0))
+ return 0;
+
+ return i915_subtests(tests, i915->engine[BCS0]->kernel_context);
+}
diff --git a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
index 6d766925ad04..3797574e1984 100644
--- a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
+++ b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
@@ -23,6 +23,8 @@ selftest(gem, i915_gem_live_selftests)
selftest(evict, i915_gem_evict_live_selftests)
selftest(hugepages, i915_gem_huge_page_live_selftests)
selftest(contexts, i915_gem_context_live_selftests)
+selftest(blt, i915_gem_object_blt_live_selftests)
+selftest(client, i915_gem_client_blt_live_selftests)
selftest(hangcheck, intel_hangcheck_live_selftests)
selftest(execlists, intel_execlists_live_selftests)
selftest(guc, intel_guc_live_selftest)
--
2.20.1
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