Check that we can retrieve the right page for a random index, and that
we can map the whole object.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_gem_object.c | 1 +
drivers/gpu/drm/i915/selftests/i915_gem_object.c | 405 +++++++++++++++++++++
.../gpu/drm/i915/selftests/i915_mock_selftests.h | 1 +
3 files changed, 407 insertions(+)
create mode 100644 drivers/gpu/drm/i915/selftests/i915_gem_object.c
diff --git a/drivers/gpu/drm/i915/i915_gem_object.c
b/drivers/gpu/drm/i915/i915_gem_object.c
index f222980cee34..30a704ea7e3b 100644
--- a/drivers/gpu/drm/i915/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/i915_gem_object.c
@@ -409,4 +409,5 @@ void *i915_gem_object_pin_map(struct drm_i915_gem_object
*obj,
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftests/huge_gem_object.c"
+#include "selftests/i915_gem_object.c"
#endif
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_object.c
b/drivers/gpu/drm/i915/selftests/i915_gem_object.c
new file mode 100644
index 000000000000..1328332150f6
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_object.c
@@ -0,0 +1,405 @@
+/*
+ * Copyright © 2017 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 "../i915_selftest.h"
+#include "i915_random.h"
+
+#include "mock_gem_device.h"
+
+#define PFN_BIAS 0x1000
+
+static void fake_free_pages(struct drm_i915_gem_object *obj,
+ struct sg_table *pages)
+{
+ sg_free_table(pages);
+ kfree(pages);
+}
+
+static struct sg_table *
+fake_get_pages(struct drm_i915_gem_object *obj)
+{
+#define GFP (GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY)
+ struct sg_table *pages;
+ struct scatterlist *sg;
+ struct rnd_state prng;
+ unsigned long pfn, rem;
+
+ prandom_seed_state(&prng, obj->scratch);
+
+ pages = kmalloc(sizeof(*pages), GFP);
+ if (!pages)
+ return ERR_PTR(-ENOMEM);
+
+ rem = obj->base.size >> PAGE_SHIFT;
+ if (sg_alloc_table(pages, obj->base.size >> PAGE_SHIFT, GFP)) {
+ kfree(pages);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ pfn = PFN_BIAS;
+ for (sg = pages->sgl; sg; sg = sg_next(sg)) {
+ unsigned int len = 1 + prandom_u32_state(&prng) % rem;
+
+ sg_set_page(sg, pfn_to_page(pfn), len * PAGE_SIZE, 0);
+
+ pfn += len;
+ rem -= len;
+ if (!rem) {
+ sg_mark_end(sg);
+ break;
+ }
+ }
+ GEM_BUG_ON(rem);
+
+ obj->mm.madv = I915_MADV_DONTNEED;
+ return pages;
+#undef GFP
+}
+
+static void fake_put_pages(struct drm_i915_gem_object *obj,
+ struct sg_table *pages)
+{
+ fake_free_pages(obj, pages);
+ obj->mm.dirty = false;
+ obj->mm.madv = I915_MADV_WILLNEED;
+}
+
+static const struct drm_i915_gem_object_ops fake_ops = {
+ .flags = I915_GEM_OBJECT_HAS_STRUCT_PAGE,
+ .get_pages = fake_get_pages,
+ .put_pages = fake_put_pages,
+};
+
+static struct drm_i915_gem_object *
+fake_object(struct drm_i915_private *i915, u64 size, u32 seed)
+{
+ struct drm_i915_gem_object *obj;
+
+ GEM_BUG_ON(!size);
+ GEM_BUG_ON(!IS_ALIGNED(size, PAGE_SIZE));
+
+ if (overflows_type(size, obj->base.size))
+ return ERR_PTR(-E2BIG);
+
+ obj = i915_gem_object_alloc(i915);
+ if (!obj)
+ return ERR_PTR(-ENOMEM);
+
+ drm_gem_private_object_init(&i915->drm, &obj->base, size);
+ i915_gem_object_init(obj, &fake_ops);
+
+ obj->base.write_domain = I915_GEM_DOMAIN_CPU;
+ obj->base.read_domains = I915_GEM_DOMAIN_CPU;
+ obj->cache_level = I915_CACHE_NONE;
+
+ obj->scratch = seed;
+
+ return obj;
+}
+
+static unsigned int *order_forward(unsigned int count, struct rnd_state *prng)
+{
+ unsigned int *order;
+ unsigned int i;
+
+ order = kmalloc(sizeof(*order) * count, GFP_TEMPORARY);
+ if (!order)
+ return NULL;
+
+ for (i = 0; i < count; i++)
+ order[i] = i;
+
+ return order;
+}
+
+static unsigned int *order_backward(unsigned int count, struct rnd_state *prng)
+{
+ unsigned int *order;
+ unsigned int i;
+
+ order = kmalloc(sizeof(*order) * count, GFP_TEMPORARY);
+ if (!order)
+ return NULL;
+
+ for (i = 0; i < count; i++)
+ order[i] = count - i - 1;
+
+ return order;
+}
+
+static unsigned int *order_random(unsigned int count, struct rnd_state *prng)
+{
+ return i915_random_order(count, prng);
+}
+
+static int igt_gem_object_get_page(void *arg)
+{
+ struct drm_i915_private *i915 = arg;
+ const struct phase {
+ const char *name;
+ unsigned int *(*order)(unsigned int, struct rnd_state *);
+ unsigned int flags;
+ } phases[] = {
+ { "forward", order_forward },
+ { "backward", order_backward },
+ { "random", order_random },
+ {}
+ }, *p;
+ I915_RND_STATE(prng);
+
+ for (p = phases; p->name; p++) {
+ const unsigned int npages = 1024;
+ struct drm_i915_gem_object *obj;
+ unsigned int *order;
+ unsigned int i;
+ int err;
+
+ order = p->order(npages, &prng);
+ if (!order)
+ return -ENOMEM;
+
+ obj = fake_object(i915,
+ npages * PAGE_SIZE,
+ prandom_u32_state(&prng));
+ if (IS_ERR(obj)) {
+ err = PTR_ERR(obj);
+ goto err_free;
+ }
+
+ err = i915_gem_object_pin_pages(obj);
+ if (err)
+ goto err_put;
+
+ for (i = 0; i < npages; i++) {
+ unsigned int idx = order[i];
+ struct page *page;
+
+ page = i915_gem_object_get_page(obj, idx);
+ if (page_to_pfn(page) != idx + PFN_BIAS) {
+ pr_err("object->page[%d:%d] lookup failed,
direction %s, found pfn %lu, expected %u\n",
+ i, idx, p->name, page_to_pfn(page), idx
+ PFN_BIAS);
+ err = EINVAL;
+ goto err_unpin;
+ }
+ }
+
+err_unpin:
+ i915_gem_object_unpin_pages(obj);
+err_put:
+ i915_gem_object_put(obj);
+err_free:
+ kfree(order);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+#define FAULT BIT(0)
+
+static void map_free_pages(struct sg_table *st)
+{
+ struct scatterlist *sg;
+
+ for (sg = st->sgl; sg; sg = __sg_next(sg)) {
+ if (sg_page(sg))
+ __free_pages(sg_page(sg), get_order(sg->length));
+ }
+
+ sg_free_table(st);
+ kfree(st);
+}
+
+static struct sg_table *
+map_get_pages(struct drm_i915_gem_object *obj)
+{
+ struct sg_table *pages;
+ struct scatterlist *sg;
+ unsigned int order;
+
+ if (obj->scratch & FAULT)
+ return ERR_PTR(-EFAULT);
+
+ pages = kmalloc(sizeof(*pages), GFP_KERNEL);
+ if (!pages)
+ return ERR_PTR(-ENOMEM);
+
+ if (sg_alloc_table(pages, MAX_ORDER, GFP_KERNEL)) {
+ kfree(pages);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ sg = pages->sgl;
+ for (order = 0; order < MAX_ORDER; order++) {
+ struct page *page;
+ unsigned int *vaddr;
+ unsigned int n;
+
+ page = alloc_pages(GFP_KERNEL, order);
+ if (!page) {
+ sg_set_page(sg, NULL, 0, 0);
+ sg_mark_end(sg);
+ map_free_pages(pages);
+ kfree(pages);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ vaddr = kmap(page);
+ for (n = 0; n < 1 << order; n++)
+ vaddr[n * PAGE_SIZE / sizeof(*vaddr)] = order;
+ kunmap(page);
+
+ sg_set_page(sg, page, PAGE_SIZE << order, 0);
+ sg = sg_next(sg);
+ }
+ GEM_BUG_ON(sg);
+
+ obj->mm.madv = I915_MADV_DONTNEED;
+ return pages;
+#undef GFP
+}
+
+static void map_put_pages(struct drm_i915_gem_object *obj,
+ struct sg_table *pages)
+{
+ map_free_pages(pages);
+ obj->mm.dirty = false;
+ obj->mm.madv = I915_MADV_WILLNEED;
+}
+
+static const struct drm_i915_gem_object_ops map_ops = {
+ .flags = I915_GEM_OBJECT_HAS_STRUCT_PAGE,
+ .get_pages = map_get_pages,
+ .put_pages = map_put_pages,
+};
+
+static struct drm_i915_gem_object *
+map_object(struct drm_i915_private *i915,
+ unsigned int flags)
+{
+ struct drm_i915_gem_object *obj;
+ unsigned int n, size;
+
+ obj = i915_gem_object_alloc(i915);
+ if (!obj)
+ return ERR_PTR(-ENOMEM);
+
+ size = 0;
+ for (n = 0; n < MAX_ORDER; n++) /* lazy! */
+ size += PAGE_SIZE << n;
+
+ drm_gem_private_object_init(&i915->drm, &obj->base, size);
+ i915_gem_object_init(obj, &map_ops);
+
+ obj->base.write_domain = I915_GEM_DOMAIN_CPU;
+ obj->base.read_domains = I915_GEM_DOMAIN_CPU;
+ obj->cache_level = I915_CACHE_NONE;
+
+ obj->scratch = flags;
+
+ return obj;
+}
+
+static int igt_gem_object_pin_map(void *arg)
+{
+ struct drm_i915_private *i915 = arg;
+ struct drm_i915_gem_object *obj;
+ const struct {
+ const char *name;
+ unsigned int flags;
+ } phases[] = {
+ { "sync" },
+ { "sync-fault", FAULT },
+ { "sync-after-fault" },
+ {},
+ }, *p;
+ unsigned int *vaddr;
+ unsigned int order;
+ int err = 0;
+
+ for (p = phases; p->name; p++) {
+ obj = map_object(i915, p->flags);
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
+
+ vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB);
+
+ if (p->flags & FAULT) {
+ if (vaddr != ERR_PTR(-EFAULT)) {
+ pr_err("Expected fault injection!\n");
+ err = -EINVAL;
+ }
+ goto err;
+ }
+
+ if (IS_ERR(vaddr)) {
+ err = PTR_ERR(vaddr);
+ goto err;
+ }
+
+ for (order = 0; order < MAX_ORDER; order++) {
+ unsigned int n;
+
+ for (n = 0; n < 1 << order; n++) {
+ if (vaddr[n * PAGE_SIZE / sizeof(*vaddr)] !=
order) {
+ pr_err("invalid mapping at order %d,
page %d: found %d\n",
+ order, n, vaddr[n *
PAGE_SIZE / sizeof(*vaddr)]);
+ err = -EINVAL;
+ goto err_unmap;
+ }
+ }
+
+ vaddr += (PAGE_SIZE << order) / sizeof(*vaddr);
+ }
+
+err_unmap:
+ i915_gem_object_unpin_map(obj);
+err:
+ i915_gem_object_put(obj);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+int i915_gem_object_mock_selftests(void)
+{
+ static const struct i915_subtest tests[] = {
+ SUBTEST(igt_gem_object_get_page),
+ SUBTEST(igt_gem_object_pin_map),
+ };
+ struct drm_i915_private *i915;
+ int err;
+
+ i915 = mock_gem_device();
+ if (!i915)
+ return -ENOMEM;
+
+ err = i915_subtests(tests, i915);
+
+ drm_dev_unref(&i915->drm);
+ return err;
+}
diff --git a/drivers/gpu/drm/i915/selftests/i915_mock_selftests.h
b/drivers/gpu/drm/i915/selftests/i915_mock_selftests.h
index 3c862db41c2c..5cae61db5b56 100644
--- a/drivers/gpu/drm/i915/selftests/i915_mock_selftests.h
+++ b/drivers/gpu/drm/i915/selftests/i915_mock_selftests.h
@@ -14,6 +14,7 @@ selftest(uncore, intel_uncore_mock_selftests)
selftest(breadcrumbs, intel_breadcrumbs_mock_selftests)
selftest(requests, i915_gem_request_mock_selftests)
selftest(gem, i915_gem_mock_selftests)
+selftest(object, i915_gem_object_mock_selftests)
selftest(dmabuf, i915_gem_dmabuf_mock_selftests)
selftest(vma, i915_vma_mock_selftests)
selftest(evict, i915_gem_evict_mock_selftests)
--
2.11.0
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