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ubuntu-linux-kernel/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c

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/*
* Copyright © 2016 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 <linux/list_sort.h>
#include <linux/prime_numbers.h>
#include "../i915_selftest.h"
#include "i915_random.h"
#include "mock_context.h"
#include "mock_drm.h"
#include "mock_gem_device.h"
static void fake_free_pages(struct drm_i915_gem_object *obj,
struct sg_table *pages)
{
sg_free_table(pages);
kfree(pages);
}
static int fake_get_pages(struct drm_i915_gem_object *obj)
{
#define GFP (GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY)
#define PFN_BIAS 0x1000
struct sg_table *pages;
struct scatterlist *sg;
unsigned int sg_page_sizes;
typeof(obj->base.size) rem;
pages = kmalloc(sizeof(*pages), GFP);
if (!pages)
return -ENOMEM;
rem = round_up(obj->base.size, BIT(31)) >> 31;
if (sg_alloc_table(pages, rem, GFP)) {
kfree(pages);
return -ENOMEM;
}
sg_page_sizes = 0;
rem = obj->base.size;
for (sg = pages->sgl; sg; sg = sg_next(sg)) {
unsigned long len = min_t(typeof(rem), rem, BIT(31));
GEM_BUG_ON(!len);
sg_set_page(sg, pfn_to_page(PFN_BIAS), len, 0);
sg_dma_address(sg) = page_to_phys(sg_page(sg));
sg_dma_len(sg) = len;
sg_page_sizes |= len;
rem -= len;
}
GEM_BUG_ON(rem);
obj->mm.madv = I915_MADV_DONTNEED;
__i915_gem_object_set_pages(obj, pages, sg_page_sizes);
return 0;
#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_IS_SHRINKABLE,
.get_pages = fake_get_pages,
.put_pages = fake_put_pages,
};
static struct drm_i915_gem_object *
fake_dma_object(struct drm_i915_private *i915, u64 size)
{
struct drm_i915_gem_object *obj;
GEM_BUG_ON(!size);
GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE));
if (overflows_type(size, obj->base.size))
return ERR_PTR(-E2BIG);
obj = i915_gem_object_alloc(i915);
if (!obj)
goto err;
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;
/* Preallocate the "backing storage" */
if (i915_gem_object_pin_pages(obj))
goto err_obj;
i915_gem_object_unpin_pages(obj);
return obj;
err_obj:
i915_gem_object_put(obj);
err:
return ERR_PTR(-ENOMEM);
}
static int igt_ppgtt_alloc(void *arg)
{
struct drm_i915_private *dev_priv = arg;
struct i915_hw_ppgtt *ppgtt;
u64 size, last;
int err;
/* Allocate a ppggt and try to fill the entire range */
if (!USES_PPGTT(dev_priv))
return 0;
ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
if (!ppgtt)
return -ENOMEM;
mutex_lock(&dev_priv->drm.struct_mutex);
err = __hw_ppgtt_init(ppgtt, dev_priv);
if (err)
goto err_ppgtt;
if (!ppgtt->base.allocate_va_range)
goto err_ppgtt_cleanup;
/* Check we can allocate the entire range */
for (size = 4096;
size <= ppgtt->base.total;
size <<= 2) {
err = ppgtt->base.allocate_va_range(&ppgtt->base, 0, size);
if (err) {
if (err == -ENOMEM) {
pr_info("[1] Ran out of memory for va_range [0 + %llx] [bit %d]\n",
size, ilog2(size));
err = 0; /* virtual space too large! */
}
goto err_ppgtt_cleanup;
}
ppgtt->base.clear_range(&ppgtt->base, 0, size);
}
/* Check we can incrementally allocate the entire range */
for (last = 0, size = 4096;
size <= ppgtt->base.total;
last = size, size <<= 2) {
err = ppgtt->base.allocate_va_range(&ppgtt->base,
last, size - last);
if (err) {
if (err == -ENOMEM) {
pr_info("[2] Ran out of memory for va_range [%llx + %llx] [bit %d]\n",
last, size - last, ilog2(size));
err = 0; /* virtual space too large! */
}
goto err_ppgtt_cleanup;
}
}
err_ppgtt_cleanup:
ppgtt->base.cleanup(&ppgtt->base);
err_ppgtt:
mutex_unlock(&dev_priv->drm.struct_mutex);
kfree(ppgtt);
return err;
}
static int lowlevel_hole(struct drm_i915_private *i915,
struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
I915_RND_STATE(seed_prng);
unsigned int size;
struct i915_vma mock_vma;
memset(&mock_vma, 0, sizeof(struct i915_vma));
/* Keep creating larger objects until one cannot fit into the hole */
for (size = 12; (hole_end - hole_start) >> size; size++) {
I915_RND_SUBSTATE(prng, seed_prng);
struct drm_i915_gem_object *obj;
unsigned int *order, count, n;
u64 hole_size;
hole_size = (hole_end - hole_start) >> size;
if (hole_size > KMALLOC_MAX_SIZE / sizeof(u32))
hole_size = KMALLOC_MAX_SIZE / sizeof(u32);
count = hole_size;
do {
count >>= 1;
order = i915_random_order(count, &prng);
} while (!order && count);
if (!order)
break;
GEM_BUG_ON(count * BIT_ULL(size) > vm->total);
GEM_BUG_ON(hole_start + count * BIT_ULL(size) > hole_end);
/* Ignore allocation failures (i.e. don't report them as
* a test failure) as we are purposefully allocating very
* large objects without checking that we have sufficient
* memory. We expect to hit -ENOMEM.
*/
obj = fake_dma_object(i915, BIT_ULL(size));
if (IS_ERR(obj)) {
kfree(order);
break;
}
GEM_BUG_ON(obj->base.size != BIT_ULL(size));
if (i915_gem_object_pin_pages(obj)) {
i915_gem_object_put(obj);
kfree(order);
break;
}
for (n = 0; n < count; n++) {
u64 addr = hole_start + order[n] * BIT_ULL(size);
GEM_BUG_ON(addr + BIT_ULL(size) > vm->total);
if (igt_timeout(end_time,
"%s timed out before %d/%d\n",
__func__, n, count)) {
hole_end = hole_start; /* quit */
break;
}
if (vm->allocate_va_range &&
vm->allocate_va_range(vm, addr, BIT_ULL(size)))
break;
mock_vma.pages = obj->mm.pages;
mock_vma.node.size = BIT_ULL(size);
mock_vma.node.start = addr;
vm->insert_entries(vm, &mock_vma, I915_CACHE_NONE, 0);
}
count = n;
i915_random_reorder(order, count, &prng);
for (n = 0; n < count; n++) {
u64 addr = hole_start + order[n] * BIT_ULL(size);
GEM_BUG_ON(addr + BIT_ULL(size) > vm->total);
vm->clear_range(vm, addr, BIT_ULL(size));
}
i915_gem_object_unpin_pages(obj);
i915_gem_object_put(obj);
kfree(order);
}
return 0;
}
static void close_object_list(struct list_head *objects,
struct i915_address_space *vm)
{
struct drm_i915_gem_object *obj, *on;
int ignored;
list_for_each_entry_safe(obj, on, objects, st_link) {
struct i915_vma *vma;
vma = i915_vma_instance(obj, vm, NULL);
if (!IS_ERR(vma))
ignored = i915_vma_unbind(vma);
/* Only ppgtt vma may be closed before the object is freed */
if (!IS_ERR(vma) && !i915_vma_is_ggtt(vma))
i915_vma_close(vma);
list_del(&obj->st_link);
i915_gem_object_put(obj);
}
}
static int fill_hole(struct drm_i915_private *i915,
struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
const u64 hole_size = hole_end - hole_start;
struct drm_i915_gem_object *obj;
const unsigned long max_pages =
min_t(u64, ULONG_MAX - 1, hole_size/2 >> PAGE_SHIFT);
const unsigned long max_step = max(int_sqrt(max_pages), 2UL);
unsigned long npages, prime, flags;
struct i915_vma *vma;
LIST_HEAD(objects);
int err;
/* Try binding many VMA working inwards from either edge */
flags = PIN_OFFSET_FIXED | PIN_USER;
if (i915_is_ggtt(vm))
flags |= PIN_GLOBAL;
for_each_prime_number_from(prime, 2, max_step) {
for (npages = 1; npages <= max_pages; npages *= prime) {
const u64 full_size = npages << PAGE_SHIFT;
const struct {
const char *name;
u64 offset;
int step;
} phases[] = {
{ "top-down", hole_end, -1, },
{ "bottom-up", hole_start, 1, },
{ }
}, *p;
obj = fake_dma_object(i915, full_size);
if (IS_ERR(obj))
break;
list_add(&obj->st_link, &objects);
/* Align differing sized objects against the edges, and
* check we don't walk off into the void when binding
* them into the GTT.
*/
for (p = phases; p->name; p++) {
u64 offset;
offset = p->offset;
list_for_each_entry(obj, &objects, st_link) {
vma = i915_vma_instance(obj, vm, NULL);
if (IS_ERR(vma))
continue;
if (p->step < 0) {
if (offset < hole_start + obj->base.size)
break;
offset -= obj->base.size;
}
err = i915_vma_pin(vma, 0, 0, offset | flags);
if (err) {
pr_err("%s(%s) pin (forward) failed with err=%d on size=%lu pages (prime=%lu), offset=%llx\n",
__func__, p->name, err, npages, prime, offset);
goto err;
}
if (!drm_mm_node_allocated(&vma->node) ||
i915_vma_misplaced(vma, 0, 0, offset | flags)) {
pr_err("%s(%s) (forward) insert failed: vma.node=%llx + %llx [allocated? %d], expected offset %llx\n",
__func__, p->name, vma->node.start, vma->node.size, drm_mm_node_allocated(&vma->node),
offset);
err = -EINVAL;
goto err;
}
i915_vma_unpin(vma);
if (p->step > 0) {
if (offset + obj->base.size > hole_end)
break;
offset += obj->base.size;
}
}
offset = p->offset;
list_for_each_entry(obj, &objects, st_link) {
vma = i915_vma_instance(obj, vm, NULL);
if (IS_ERR(vma))
continue;
if (p->step < 0) {
if (offset < hole_start + obj->base.size)
break;
offset -= obj->base.size;
}
if (!drm_mm_node_allocated(&vma->node) ||
i915_vma_misplaced(vma, 0, 0, offset | flags)) {
pr_err("%s(%s) (forward) moved vma.node=%llx + %llx, expected offset %llx\n",
__func__, p->name, vma->node.start, vma->node.size,
offset);
err = -EINVAL;
goto err;
}
err = i915_vma_unbind(vma);
if (err) {
pr_err("%s(%s) (forward) unbind of vma.node=%llx + %llx failed with err=%d\n",
__func__, p->name, vma->node.start, vma->node.size,
err);
goto err;
}
if (p->step > 0) {
if (offset + obj->base.size > hole_end)
break;
offset += obj->base.size;
}
}
offset = p->offset;
list_for_each_entry_reverse(obj, &objects, st_link) {
vma = i915_vma_instance(obj, vm, NULL);
if (IS_ERR(vma))
continue;
if (p->step < 0) {
if (offset < hole_start + obj->base.size)
break;
offset -= obj->base.size;
}
err = i915_vma_pin(vma, 0, 0, offset | flags);
if (err) {
pr_err("%s(%s) pin (backward) failed with err=%d on size=%lu pages (prime=%lu), offset=%llx\n",
__func__, p->name, err, npages, prime, offset);
goto err;
}
if (!drm_mm_node_allocated(&vma->node) ||
i915_vma_misplaced(vma, 0, 0, offset | flags)) {
pr_err("%s(%s) (backward) insert failed: vma.node=%llx + %llx [allocated? %d], expected offset %llx\n",
__func__, p->name, vma->node.start, vma->node.size, drm_mm_node_allocated(&vma->node),
offset);
err = -EINVAL;
goto err;
}
i915_vma_unpin(vma);
if (p->step > 0) {
if (offset + obj->base.size > hole_end)
break;
offset += obj->base.size;
}
}
offset = p->offset;
list_for_each_entry_reverse(obj, &objects, st_link) {
vma = i915_vma_instance(obj, vm, NULL);
if (IS_ERR(vma))
continue;
if (p->step < 0) {
if (offset < hole_start + obj->base.size)
break;
offset -= obj->base.size;
}
if (!drm_mm_node_allocated(&vma->node) ||
i915_vma_misplaced(vma, 0, 0, offset | flags)) {
pr_err("%s(%s) (backward) moved vma.node=%llx + %llx [allocated? %d], expected offset %llx\n",
__func__, p->name, vma->node.start, vma->node.size, drm_mm_node_allocated(&vma->node),
offset);
err = -EINVAL;
goto err;
}
err = i915_vma_unbind(vma);
if (err) {
pr_err("%s(%s) (backward) unbind of vma.node=%llx + %llx failed with err=%d\n",
__func__, p->name, vma->node.start, vma->node.size,
err);
goto err;
}
if (p->step > 0) {
if (offset + obj->base.size > hole_end)
break;
offset += obj->base.size;
}
}
}
if (igt_timeout(end_time, "%s timed out (npages=%lu, prime=%lu)\n",
__func__, npages, prime)) {
err = -EINTR;
goto err;
}
}
close_object_list(&objects, vm);
}
return 0;
err:
close_object_list(&objects, vm);
return err;
}
static int walk_hole(struct drm_i915_private *i915,
struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
const u64 hole_size = hole_end - hole_start;
const unsigned long max_pages =
min_t(u64, ULONG_MAX - 1, hole_size >> PAGE_SHIFT);
unsigned long flags;
u64 size;
/* Try binding a single VMA in different positions within the hole */
flags = PIN_OFFSET_FIXED | PIN_USER;
if (i915_is_ggtt(vm))
flags |= PIN_GLOBAL;
for_each_prime_number_from(size, 1, max_pages) {
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
u64 addr;
int err = 0;
obj = fake_dma_object(i915, size << PAGE_SHIFT);
if (IS_ERR(obj))
break;
vma = i915_vma_instance(obj, vm, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto err_put;
}
for (addr = hole_start;
addr + obj->base.size < hole_end;
addr += obj->base.size) {
err = i915_vma_pin(vma, 0, 0, addr | flags);
if (err) {
pr_err("%s bind failed at %llx + %llx [hole %llx- %llx] with err=%d\n",
__func__, addr, vma->size,
hole_start, hole_end, err);
goto err_close;
}
i915_vma_unpin(vma);
if (!drm_mm_node_allocated(&vma->node) ||
i915_vma_misplaced(vma, 0, 0, addr | flags)) {
pr_err("%s incorrect at %llx + %llx\n",
__func__, addr, vma->size);
err = -EINVAL;
goto err_close;
}
err = i915_vma_unbind(vma);
if (err) {
pr_err("%s unbind failed at %llx + %llx with err=%d\n",
__func__, addr, vma->size, err);
goto err_close;
}
GEM_BUG_ON(drm_mm_node_allocated(&vma->node));
if (igt_timeout(end_time,
"%s timed out at %llx\n",
__func__, addr)) {
err = -EINTR;
goto err_close;
}
}
err_close:
if (!i915_vma_is_ggtt(vma))
i915_vma_close(vma);
err_put:
i915_gem_object_put(obj);
if (err)
return err;
}
return 0;
}
static int pot_hole(struct drm_i915_private *i915,
struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
unsigned long flags;
unsigned int pot;
int err = 0;
flags = PIN_OFFSET_FIXED | PIN_USER;
if (i915_is_ggtt(vm))
flags |= PIN_GLOBAL;
obj = i915_gem_object_create_internal(i915, 2 * I915_GTT_PAGE_SIZE);
if (IS_ERR(obj))
return PTR_ERR(obj);
vma = i915_vma_instance(obj, vm, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto err_obj;
}
/* Insert a pair of pages across every pot boundary within the hole */
for (pot = fls64(hole_end - 1) - 1;
pot > ilog2(2 * I915_GTT_PAGE_SIZE);
pot--) {
u64 step = BIT_ULL(pot);
u64 addr;
for (addr = round_up(hole_start + I915_GTT_PAGE_SIZE, step) - I915_GTT_PAGE_SIZE;
addr <= round_down(hole_end - 2*I915_GTT_PAGE_SIZE, step) - I915_GTT_PAGE_SIZE;
addr += step) {
err = i915_vma_pin(vma, 0, 0, addr | flags);
if (err) {
pr_err("%s failed to pin object at %llx in hole [%llx - %llx], with err=%d\n",
__func__,
addr,
hole_start, hole_end,
err);
goto err;
}
if (!drm_mm_node_allocated(&vma->node) ||
i915_vma_misplaced(vma, 0, 0, addr | flags)) {
pr_err("%s incorrect at %llx + %llx\n",
__func__, addr, vma->size);
i915_vma_unpin(vma);
err = i915_vma_unbind(vma);
err = -EINVAL;
goto err;
}
i915_vma_unpin(vma);
err = i915_vma_unbind(vma);
GEM_BUG_ON(err);
}
if (igt_timeout(end_time,
"%s timed out after %d/%d\n",
__func__, pot, fls64(hole_end - 1) - 1)) {
err = -EINTR;
goto err;
}
}
err:
if (!i915_vma_is_ggtt(vma))
i915_vma_close(vma);
err_obj:
i915_gem_object_put(obj);
return err;
}
static int drunk_hole(struct drm_i915_private *i915,
struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
I915_RND_STATE(prng);
unsigned int size;
unsigned long flags;
flags = PIN_OFFSET_FIXED | PIN_USER;
if (i915_is_ggtt(vm))
flags |= PIN_GLOBAL;
/* Keep creating larger objects until one cannot fit into the hole */
for (size = 12; (hole_end - hole_start) >> size; size++) {
struct drm_i915_gem_object *obj;
unsigned int *order, count, n;
struct i915_vma *vma;
u64 hole_size;
int err;
hole_size = (hole_end - hole_start) >> size;
if (hole_size > KMALLOC_MAX_SIZE / sizeof(u32))
hole_size = KMALLOC_MAX_SIZE / sizeof(u32);
count = hole_size;
do {
count >>= 1;
order = i915_random_order(count, &prng);
} while (!order && count);
if (!order)
break;
/* Ignore allocation failures (i.e. don't report them as
* a test failure) as we are purposefully allocating very
* large objects without checking that we have sufficient
* memory. We expect to hit -ENOMEM.
*/
obj = fake_dma_object(i915, BIT_ULL(size));
if (IS_ERR(obj)) {
kfree(order);
break;
}
vma = i915_vma_instance(obj, vm, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto err_obj;
}
GEM_BUG_ON(vma->size != BIT_ULL(size));
for (n = 0; n < count; n++) {
u64 addr = hole_start + order[n] * BIT_ULL(size);
err = i915_vma_pin(vma, 0, 0, addr | flags);
if (err) {
pr_err("%s failed to pin object at %llx + %llx in hole [%llx - %llx], with err=%d\n",
__func__,
addr, BIT_ULL(size),
hole_start, hole_end,
err);
goto err;
}
if (!drm_mm_node_allocated(&vma->node) ||
i915_vma_misplaced(vma, 0, 0, addr | flags)) {
pr_err("%s incorrect at %llx + %llx\n",
__func__, addr, BIT_ULL(size));
i915_vma_unpin(vma);
err = i915_vma_unbind(vma);
err = -EINVAL;
goto err;
}
i915_vma_unpin(vma);
err = i915_vma_unbind(vma);
GEM_BUG_ON(err);
if (igt_timeout(end_time,
"%s timed out after %d/%d\n",
__func__, n, count)) {
err = -EINTR;
goto err;
}
}
err:
if (!i915_vma_is_ggtt(vma))
i915_vma_close(vma);
err_obj:
i915_gem_object_put(obj);
kfree(order);
if (err)
return err;
}
return 0;
}
static int __shrink_hole(struct drm_i915_private *i915,
struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
struct drm_i915_gem_object *obj;
unsigned long flags = PIN_OFFSET_FIXED | PIN_USER;
unsigned int order = 12;
LIST_HEAD(objects);
int err = 0;
u64 addr;
/* Keep creating larger objects until one cannot fit into the hole */
for (addr = hole_start; addr < hole_end; ) {
struct i915_vma *vma;
u64 size = BIT_ULL(order++);
size = min(size, hole_end - addr);
obj = fake_dma_object(i915, size);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
break;
}
list_add(&obj->st_link, &objects);
vma = i915_vma_instance(obj, vm, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
break;
}
GEM_BUG_ON(vma->size != size);
err = i915_vma_pin(vma, 0, 0, addr | flags);
if (err) {
pr_err("%s failed to pin object at %llx + %llx in hole [%llx - %llx], with err=%d\n",
__func__, addr, size, hole_start, hole_end, err);
break;
}
if (!drm_mm_node_allocated(&vma->node) ||
i915_vma_misplaced(vma, 0, 0, addr | flags)) {
pr_err("%s incorrect at %llx + %llx\n",
__func__, addr, size);
i915_vma_unpin(vma);
err = i915_vma_unbind(vma);
err = -EINVAL;
break;
}
i915_vma_unpin(vma);
addr += size;
if (igt_timeout(end_time,
"%s timed out at ofset %llx [%llx - %llx]\n",
__func__, addr, hole_start, hole_end)) {
err = -EINTR;
break;
}
}
close_object_list(&objects, vm);
return err;
}
static int shrink_hole(struct drm_i915_private *i915,
struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
unsigned long prime;
int err;
vm->fault_attr.probability = 999;
atomic_set(&vm->fault_attr.times, -1);
for_each_prime_number_from(prime, 0, ULONG_MAX - 1) {
vm->fault_attr.interval = prime;
err = __shrink_hole(i915, vm, hole_start, hole_end, end_time);
if (err)
break;
}
memset(&vm->fault_attr, 0, sizeof(vm->fault_attr));
return err;
}
static int exercise_ppgtt(struct drm_i915_private *dev_priv,
int (*func)(struct drm_i915_private *i915,
struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time))
{
struct drm_file *file;
struct i915_hw_ppgtt *ppgtt;
IGT_TIMEOUT(end_time);
int err;
if (!USES_FULL_PPGTT(dev_priv))
return 0;
file = mock_file(dev_priv);
if (IS_ERR(file))
return PTR_ERR(file);
mutex_lock(&dev_priv->drm.struct_mutex);
ppgtt = i915_ppgtt_create(dev_priv, file->driver_priv, "mock");
if (IS_ERR(ppgtt)) {
err = PTR_ERR(ppgtt);
goto out_unlock;
}
GEM_BUG_ON(offset_in_page(ppgtt->base.total));
GEM_BUG_ON(ppgtt->base.closed);
err = func(dev_priv, &ppgtt->base, 0, ppgtt->base.total, end_time);
i915_ppgtt_close(&ppgtt->base);
i915_ppgtt_put(ppgtt);
out_unlock:
mutex_unlock(&dev_priv->drm.struct_mutex);
mock_file_free(dev_priv, file);
return err;
}
static int igt_ppgtt_fill(void *arg)
{
return exercise_ppgtt(arg, fill_hole);
}
static int igt_ppgtt_walk(void *arg)
{
return exercise_ppgtt(arg, walk_hole);
}
static int igt_ppgtt_pot(void *arg)
{
return exercise_ppgtt(arg, pot_hole);
}
static int igt_ppgtt_drunk(void *arg)
{
return exercise_ppgtt(arg, drunk_hole);
}
static int igt_ppgtt_lowlevel(void *arg)
{
return exercise_ppgtt(arg, lowlevel_hole);
}
static int igt_ppgtt_shrink(void *arg)
{
return exercise_ppgtt(arg, shrink_hole);
}
static int sort_holes(void *priv, struct list_head *A, struct list_head *B)
{
struct drm_mm_node *a = list_entry(A, typeof(*a), hole_stack);
struct drm_mm_node *b = list_entry(B, typeof(*b), hole_stack);
if (a->start < b->start)
return -1;
else
return 1;
}
static int exercise_ggtt(struct drm_i915_private *i915,
int (*func)(struct drm_i915_private *i915,
struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time))
{
struct i915_ggtt *ggtt = &i915->ggtt;
u64 hole_start, hole_end, last = 0;
struct drm_mm_node *node;
IGT_TIMEOUT(end_time);
int err;
mutex_lock(&i915->drm.struct_mutex);
restart:
list_sort(NULL, &ggtt->base.mm.hole_stack, sort_holes);
drm_mm_for_each_hole(node, &ggtt->base.mm, hole_start, hole_end) {
if (hole_start < last)
continue;
if (ggtt->base.mm.color_adjust)
ggtt->base.mm.color_adjust(node, 0,
&hole_start, &hole_end);
if (hole_start >= hole_end)
continue;
err = func(i915, &ggtt->base, hole_start, hole_end, end_time);
if (err)
break;
/* As we have manipulated the drm_mm, the list may be corrupt */
last = hole_end;
goto restart;
}
mutex_unlock(&i915->drm.struct_mutex);
return err;
}
static int igt_ggtt_fill(void *arg)
{
return exercise_ggtt(arg, fill_hole);
}
static int igt_ggtt_walk(void *arg)
{
return exercise_ggtt(arg, walk_hole);
}
static int igt_ggtt_pot(void *arg)
{
return exercise_ggtt(arg, pot_hole);
}
static int igt_ggtt_drunk(void *arg)
{
return exercise_ggtt(arg, drunk_hole);
}
static int igt_ggtt_lowlevel(void *arg)
{
return exercise_ggtt(arg, lowlevel_hole);
}
static int igt_ggtt_page(void *arg)
{
const unsigned int count = PAGE_SIZE/sizeof(u32);
I915_RND_STATE(prng);
struct drm_i915_private *i915 = arg;
struct i915_ggtt *ggtt = &i915->ggtt;
struct drm_i915_gem_object *obj;
struct drm_mm_node tmp;
unsigned int *order, n;
int err;
mutex_lock(&i915->drm.struct_mutex);
obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto out_unlock;
}
err = i915_gem_object_pin_pages(obj);
if (err)
goto out_free;
memset(&tmp, 0, sizeof(tmp));
err = drm_mm_insert_node_in_range(&ggtt->base.mm, &tmp,
1024 * PAGE_SIZE, 0,
I915_COLOR_UNEVICTABLE,
0, ggtt->mappable_end,
DRM_MM_INSERT_LOW);
if (err)
goto out_unpin;
order = i915_random_order(count, &prng);
if (!order) {
err = -ENOMEM;
goto out_remove;
}
for (n = 0; n < count; n++) {
u64 offset = tmp.start + order[n] * PAGE_SIZE;
u32 __iomem *vaddr;
ggtt->base.insert_page(&ggtt->base,
i915_gem_object_get_dma_address(obj, 0),
offset, I915_CACHE_NONE, 0);
vaddr = io_mapping_map_atomic_wc(&ggtt->mappable, offset);
iowrite32(n, vaddr + n);
io_mapping_unmap_atomic(vaddr);
wmb();
ggtt->base.clear_range(&ggtt->base, offset, PAGE_SIZE);
}
i915_random_reorder(order, count, &prng);
for (n = 0; n < count; n++) {
u64 offset = tmp.start + order[n] * PAGE_SIZE;
u32 __iomem *vaddr;
u32 val;
ggtt->base.insert_page(&ggtt->base,
i915_gem_object_get_dma_address(obj, 0),
offset, I915_CACHE_NONE, 0);
vaddr = io_mapping_map_atomic_wc(&ggtt->mappable, offset);
val = ioread32(vaddr + n);
io_mapping_unmap_atomic(vaddr);
ggtt->base.clear_range(&ggtt->base, offset, PAGE_SIZE);
if (val != n) {
pr_err("insert page failed: found %d, expected %d\n",
val, n);
err = -EINVAL;
break;
}
}
kfree(order);
out_remove:
drm_mm_remove_node(&tmp);
out_unpin:
i915_gem_object_unpin_pages(obj);
out_free:
i915_gem_object_put(obj);
out_unlock:
mutex_unlock(&i915->drm.struct_mutex);
return err;
}
static void track_vma_bind(struct i915_vma *vma)
{
struct drm_i915_gem_object *obj = vma->obj;
obj->bind_count++; /* track for eviction later */
__i915_gem_object_pin_pages(obj);
vma->pages = obj->mm.pages;
list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
}
static int exercise_mock(struct drm_i915_private *i915,
int (*func)(struct drm_i915_private *i915,
struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time))
{
struct i915_gem_context *ctx;
struct i915_hw_ppgtt *ppgtt;
IGT_TIMEOUT(end_time);
int err;
ctx = mock_context(i915, "mock");
if (!ctx)
return -ENOMEM;
ppgtt = ctx->ppgtt;
GEM_BUG_ON(!ppgtt);
err = func(i915, &ppgtt->base, 0, ppgtt->base.total, end_time);
mock_context_close(ctx);
return err;
}
static int igt_mock_fill(void *arg)
{
return exercise_mock(arg, fill_hole);
}
static int igt_mock_walk(void *arg)
{
return exercise_mock(arg, walk_hole);
}
static int igt_mock_pot(void *arg)
{
return exercise_mock(arg, pot_hole);
}
static int igt_mock_drunk(void *arg)
{
return exercise_mock(arg, drunk_hole);
}
static int igt_gtt_reserve(void *arg)
{
struct drm_i915_private *i915 = arg;
struct drm_i915_gem_object *obj, *on;
LIST_HEAD(objects);
u64 total;
int err;
/* i915_gem_gtt_reserve() tries to reserve the precise range
* for the node, and evicts if it has to. So our test checks that
* it can give us the requsted space and prevent overlaps.
*/
/* Start by filling the GGTT */
for (total = 0;
total + 2*I915_GTT_PAGE_SIZE <= i915->ggtt.base.total;
total += 2*I915_GTT_PAGE_SIZE) {
struct i915_vma *vma;
obj = i915_gem_object_create_internal(i915, 2*PAGE_SIZE);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto out;
}
err = i915_gem_object_pin_pages(obj);
if (err) {
i915_gem_object_put(obj);
goto out;
}
list_add(&obj->st_link, &objects);
vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out;
}
err = i915_gem_gtt_reserve(&i915->ggtt.base, &vma->node,
obj->base.size,
total,
obj->cache_level,
0);
if (err) {
pr_err("i915_gem_gtt_reserve (pass 1) failed at %llu/%llu with err=%d\n",
total, i915->ggtt.base.total, err);
goto out;
}
track_vma_bind(vma);
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
if (vma->node.start != total ||
vma->node.size != 2*I915_GTT_PAGE_SIZE) {
pr_err("i915_gem_gtt_reserve (pass 1) placement failed, found (%llx + %llx), expected (%llx + %lx)\n",
vma->node.start, vma->node.size,
total, 2*I915_GTT_PAGE_SIZE);
err = -EINVAL;
goto out;
}
}
/* Now we start forcing evictions */
for (total = I915_GTT_PAGE_SIZE;
total + 2*I915_GTT_PAGE_SIZE <= i915->ggtt.base.total;
total += 2*I915_GTT_PAGE_SIZE) {
struct i915_vma *vma;
obj = i915_gem_object_create_internal(i915, 2*PAGE_SIZE);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto out;
}
err = i915_gem_object_pin_pages(obj);
if (err) {
i915_gem_object_put(obj);
goto out;
}
list_add(&obj->st_link, &objects);
vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out;
}
err = i915_gem_gtt_reserve(&i915->ggtt.base, &vma->node,
obj->base.size,
total,
obj->cache_level,
0);
if (err) {
pr_err("i915_gem_gtt_reserve (pass 2) failed at %llu/%llu with err=%d\n",
total, i915->ggtt.base.total, err);
goto out;
}
track_vma_bind(vma);
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
if (vma->node.start != total ||
vma->node.size != 2*I915_GTT_PAGE_SIZE) {
pr_err("i915_gem_gtt_reserve (pass 2) placement failed, found (%llx + %llx), expected (%llx + %lx)\n",
vma->node.start, vma->node.size,
total, 2*I915_GTT_PAGE_SIZE);
err = -EINVAL;
goto out;
}
}
/* And then try at random */
list_for_each_entry_safe(obj, on, &objects, st_link) {
struct i915_vma *vma;
u64 offset;
vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out;
}
err = i915_vma_unbind(vma);
if (err) {
pr_err("i915_vma_unbind failed with err=%d!\n", err);
goto out;
}
offset = random_offset(0, i915->ggtt.base.total,
2*I915_GTT_PAGE_SIZE,
I915_GTT_MIN_ALIGNMENT);
err = i915_gem_gtt_reserve(&i915->ggtt.base, &vma->node,
obj->base.size,
offset,
obj->cache_level,
0);
if (err) {
pr_err("i915_gem_gtt_reserve (pass 3) failed at %llu/%llu with err=%d\n",
total, i915->ggtt.base.total, err);
goto out;
}
track_vma_bind(vma);
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
if (vma->node.start != offset ||
vma->node.size != 2*I915_GTT_PAGE_SIZE) {
pr_err("i915_gem_gtt_reserve (pass 3) placement failed, found (%llx + %llx), expected (%llx + %lx)\n",
vma->node.start, vma->node.size,
offset, 2*I915_GTT_PAGE_SIZE);
err = -EINVAL;
goto out;
}
}
out:
list_for_each_entry_safe(obj, on, &objects, st_link) {
i915_gem_object_unpin_pages(obj);
i915_gem_object_put(obj);
}
return err;
}
static int igt_gtt_insert(void *arg)
{
struct drm_i915_private *i915 = arg;
struct drm_i915_gem_object *obj, *on;
struct drm_mm_node tmp = {};
const struct invalid_insert {
u64 size;
u64 alignment;
u64 start, end;
} invalid_insert[] = {
{
i915->ggtt.base.total + I915_GTT_PAGE_SIZE, 0,
0, i915->ggtt.base.total,
},
{
2*I915_GTT_PAGE_SIZE, 0,
0, I915_GTT_PAGE_SIZE,
},
{
-(u64)I915_GTT_PAGE_SIZE, 0,
0, 4*I915_GTT_PAGE_SIZE,
},
{
-(u64)2*I915_GTT_PAGE_SIZE, 2*I915_GTT_PAGE_SIZE,
0, 4*I915_GTT_PAGE_SIZE,
},
{
I915_GTT_PAGE_SIZE, I915_GTT_MIN_ALIGNMENT << 1,
I915_GTT_MIN_ALIGNMENT, I915_GTT_MIN_ALIGNMENT << 1,
},
{}
}, *ii;
LIST_HEAD(objects);
u64 total;
int err;
/* i915_gem_gtt_insert() tries to allocate some free space in the GTT
* to the node, evicting if required.
*/
/* Check a couple of obviously invalid requests */
for (ii = invalid_insert; ii->size; ii++) {
err = i915_gem_gtt_insert(&i915->ggtt.base, &tmp,
ii->size, ii->alignment,
I915_COLOR_UNEVICTABLE,
ii->start, ii->end,
0);
if (err != -ENOSPC) {
pr_err("Invalid i915_gem_gtt_insert(.size=%llx, .alignment=%llx, .start=%llx, .end=%llx) succeeded (err=%d)\n",
ii->size, ii->alignment, ii->start, ii->end,
err);
return -EINVAL;
}
}
/* Start by filling the GGTT */
for (total = 0;
total + I915_GTT_PAGE_SIZE <= i915->ggtt.base.total;
total += I915_GTT_PAGE_SIZE) {
struct i915_vma *vma;
obj = i915_gem_object_create_internal(i915, I915_GTT_PAGE_SIZE);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto out;
}
err = i915_gem_object_pin_pages(obj);
if (err) {
i915_gem_object_put(obj);
goto out;
}
list_add(&obj->st_link, &objects);
vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out;
}
err = i915_gem_gtt_insert(&i915->ggtt.base, &vma->node,
obj->base.size, 0, obj->cache_level,
0, i915->ggtt.base.total,
0);
if (err == -ENOSPC) {
/* maxed out the GGTT space */
i915_gem_object_put(obj);
break;
}
if (err) {
pr_err("i915_gem_gtt_insert (pass 1) failed at %llu/%llu with err=%d\n",
total, i915->ggtt.base.total, err);
goto out;
}
track_vma_bind(vma);
__i915_vma_pin(vma);
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
}
list_for_each_entry(obj, &objects, st_link) {
struct i915_vma *vma;
vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out;
}
if (!drm_mm_node_allocated(&vma->node)) {
pr_err("VMA was unexpectedly evicted!\n");
err = -EINVAL;
goto out;
}
__i915_vma_unpin(vma);
}
/* If we then reinsert, we should find the same hole */
list_for_each_entry_safe(obj, on, &objects, st_link) {
struct i915_vma *vma;
u64 offset;
vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out;
}
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
offset = vma->node.start;
err = i915_vma_unbind(vma);
if (err) {
pr_err("i915_vma_unbind failed with err=%d!\n", err);
goto out;
}
err = i915_gem_gtt_insert(&i915->ggtt.base, &vma->node,
obj->base.size, 0, obj->cache_level,
0, i915->ggtt.base.total,
0);
if (err) {
pr_err("i915_gem_gtt_insert (pass 2) failed at %llu/%llu with err=%d\n",
total, i915->ggtt.base.total, err);
goto out;
}
track_vma_bind(vma);
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
if (vma->node.start != offset) {
pr_err("i915_gem_gtt_insert did not return node to its previous location (the only hole), expected address %llx, found %llx\n",
offset, vma->node.start);
err = -EINVAL;
goto out;
}
}
/* And then force evictions */
for (total = 0;
total + 2*I915_GTT_PAGE_SIZE <= i915->ggtt.base.total;
total += 2*I915_GTT_PAGE_SIZE) {
struct i915_vma *vma;
obj = i915_gem_object_create_internal(i915, 2*I915_GTT_PAGE_SIZE);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto out;
}
err = i915_gem_object_pin_pages(obj);
if (err) {
i915_gem_object_put(obj);
goto out;
}
list_add(&obj->st_link, &objects);
vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out;
}
err = i915_gem_gtt_insert(&i915->ggtt.base, &vma->node,
obj->base.size, 0, obj->cache_level,
0, i915->ggtt.base.total,
0);
if (err) {
pr_err("i915_gem_gtt_insert (pass 3) failed at %llu/%llu with err=%d\n",
total, i915->ggtt.base.total, err);
goto out;
}
track_vma_bind(vma);
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
}
out:
list_for_each_entry_safe(obj, on, &objects, st_link) {
i915_gem_object_unpin_pages(obj);
i915_gem_object_put(obj);
}
return err;
}
int i915_gem_gtt_mock_selftests(void)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_mock_drunk),
SUBTEST(igt_mock_walk),
SUBTEST(igt_mock_pot),
SUBTEST(igt_mock_fill),
SUBTEST(igt_gtt_reserve),
SUBTEST(igt_gtt_insert),
};
struct drm_i915_private *i915;
int err;
i915 = mock_gem_device();
if (!i915)
return -ENOMEM;
mutex_lock(&i915->drm.struct_mutex);
err = i915_subtests(tests, i915);
mutex_unlock(&i915->drm.struct_mutex);
drm_dev_unref(&i915->drm);
return err;
}
int i915_gem_gtt_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_ppgtt_alloc),
SUBTEST(igt_ppgtt_lowlevel),
SUBTEST(igt_ppgtt_drunk),
SUBTEST(igt_ppgtt_walk),
SUBTEST(igt_ppgtt_pot),
SUBTEST(igt_ppgtt_fill),
SUBTEST(igt_ppgtt_shrink),
SUBTEST(igt_ggtt_lowlevel),
SUBTEST(igt_ggtt_drunk),
SUBTEST(igt_ggtt_walk),
SUBTEST(igt_ggtt_pot),
SUBTEST(igt_ggtt_fill),
SUBTEST(igt_ggtt_page),
};
GEM_BUG_ON(offset_in_page(i915->ggtt.base.total));
return i915_subtests(tests, i915);
}
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