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linuxdebug/drivers/gpu/drm/i915/selftests/i915_vma.c

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null pointer error
2024-07-16 15:50:57 +02:00
/*
* 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/prime_numbers.h>
#include "gem/i915_gem_context.h"
#include "gem/i915_gem_internal.h"
#include "gem/selftests/mock_context.h"
#include "i915_scatterlist.h"
#include "i915_selftest.h"
#include "mock_gem_device.h"
#include "mock_gtt.h"
static bool assert_vma(struct i915_vma *vma,
struct drm_i915_gem_object *obj,
struct i915_gem_context *ctx)
{
bool ok = true;
if (vma->vm != ctx->vm) {
pr_err("VMA created with wrong VM\n");
ok = false;
}
if (vma->size != obj->base.size) {
pr_err("VMA created with wrong size, found %llu, expected %zu\n",
vma->size, obj->base.size);
ok = false;
}
if (vma->gtt_view.type != I915_GTT_VIEW_NORMAL) {
pr_err("VMA created with wrong type [%d]\n",
vma->gtt_view.type);
ok = false;
}
return ok;
}
static struct i915_vma *
checked_vma_instance(struct drm_i915_gem_object *obj,
struct i915_address_space *vm,
const struct i915_gtt_view *view)
{
struct i915_vma *vma;
bool ok = true;
vma = i915_vma_instance(obj, vm, view);
if (IS_ERR(vma))
return vma;
/* Manual checks, will be reinforced by i915_vma_compare! */
if (vma->vm != vm) {
pr_err("VMA's vm [%p] does not match request [%p]\n",
vma->vm, vm);
ok = false;
}
if (i915_is_ggtt(vm) != i915_vma_is_ggtt(vma)) {
pr_err("VMA ggtt status [%d] does not match parent [%d]\n",
i915_vma_is_ggtt(vma), i915_is_ggtt(vm));
ok = false;
}
if (i915_vma_compare(vma, vm, view)) {
pr_err("i915_vma_compare failed with create parameters!\n");
return ERR_PTR(-EINVAL);
}
if (i915_vma_compare(vma, vma->vm,
i915_vma_is_ggtt(vma) ? &vma->gtt_view : NULL)) {
pr_err("i915_vma_compare failed with itself\n");
return ERR_PTR(-EINVAL);
}
if (!ok) {
pr_err("i915_vma_compare failed to detect the difference!\n");
return ERR_PTR(-EINVAL);
}
return vma;
}
static int create_vmas(struct drm_i915_private *i915,
struct list_head *objects,
struct list_head *contexts)
{
struct drm_i915_gem_object *obj;
struct i915_gem_context *ctx;
int pinned;
list_for_each_entry(obj, objects, st_link) {
for (pinned = 0; pinned <= 1; pinned++) {
list_for_each_entry(ctx, contexts, link) {
struct i915_address_space *vm;
struct i915_vma *vma;
int err;
vm = i915_gem_context_get_eb_vm(ctx);
vma = checked_vma_instance(obj, vm, NULL);
i915_vm_put(vm);
if (IS_ERR(vma))
return PTR_ERR(vma);
if (!assert_vma(vma, obj, ctx)) {
pr_err("VMA lookup/create failed\n");
return -EINVAL;
}
if (!pinned) {
err = i915_vma_pin(vma, 0, 0, PIN_USER);
if (err) {
pr_err("Failed to pin VMA\n");
return err;
}
} else {
i915_vma_unpin(vma);
}
}
}
}
return 0;
}
static int igt_vma_create(void *arg)
{
struct i915_ggtt *ggtt = arg;
struct drm_i915_private *i915 = ggtt->vm.i915;
struct drm_i915_gem_object *obj, *on;
struct i915_gem_context *ctx, *cn;
unsigned long num_obj, num_ctx;
unsigned long no, nc;
IGT_TIMEOUT(end_time);
LIST_HEAD(contexts);
LIST_HEAD(objects);
int err = -ENOMEM;
/* Exercise creating many vma amonst many objections, checking the
* vma creation and lookup routines.
*/
no = 0;
for_each_prime_number(num_obj, ULONG_MAX - 1) {
for (; no < num_obj; no++) {
obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
if (IS_ERR(obj))
goto out;
list_add(&obj->st_link, &objects);
}
nc = 0;
for_each_prime_number(num_ctx, 2 * BITS_PER_LONG) {
for (; nc < num_ctx; nc++) {
ctx = mock_context(i915, "mock");
if (!ctx)
goto out;
list_move(&ctx->link, &contexts);
}
err = create_vmas(i915, &objects, &contexts);
if (err)
goto out;
if (igt_timeout(end_time,
"%s timed out: after %lu objects in %lu contexts\n",
__func__, no, nc))
goto end;
}
list_for_each_entry_safe(ctx, cn, &contexts, link) {
list_del_init(&ctx->link);
mock_context_close(ctx);
}
cond_resched();
}
end:
/* Final pass to lookup all created contexts */
err = create_vmas(i915, &objects, &contexts);
out:
list_for_each_entry_safe(ctx, cn, &contexts, link) {
list_del_init(&ctx->link);
mock_context_close(ctx);
}
list_for_each_entry_safe(obj, on, &objects, st_link)
i915_gem_object_put(obj);
return err;
}
struct pin_mode {
u64 size;
u64 flags;
bool (*assert)(const struct i915_vma *,
const struct pin_mode *mode,
int result);
const char *string;
};
static bool assert_pin_valid(const struct i915_vma *vma,
const struct pin_mode *mode,
int result)
{
if (result)
return false;
if (i915_vma_misplaced(vma, mode->size, 0, mode->flags))
return false;
return true;
}
__maybe_unused
static bool assert_pin_enospc(const struct i915_vma *vma,
const struct pin_mode *mode,
int result)
{
return result == -ENOSPC;
}
__maybe_unused
static bool assert_pin_einval(const struct i915_vma *vma,
const struct pin_mode *mode,
int result)
{
return result == -EINVAL;
}
static int igt_vma_pin1(void *arg)
{
struct i915_ggtt *ggtt = arg;
const struct pin_mode modes[] = {
#define VALID(sz, fl) { .size = (sz), .flags = (fl), .assert = assert_pin_valid, .string = #sz ", " #fl ", (valid) " }
#define __INVALID(sz, fl, check, eval) { .size = (sz), .flags = (fl), .assert = (check), .string = #sz ", " #fl ", (invalid " #eval ")" }
#define INVALID(sz, fl) __INVALID(sz, fl, assert_pin_einval, EINVAL)
#define NOSPACE(sz, fl) __INVALID(sz, fl, assert_pin_enospc, ENOSPC)
VALID(0, PIN_GLOBAL),
VALID(0, PIN_GLOBAL | PIN_MAPPABLE),
VALID(0, PIN_GLOBAL | PIN_OFFSET_BIAS | 4096),
VALID(0, PIN_GLOBAL | PIN_OFFSET_BIAS | 8192),
VALID(0, PIN_GLOBAL | PIN_OFFSET_BIAS | (ggtt->mappable_end - 4096)),
VALID(0, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_BIAS | (ggtt->mappable_end - 4096)),
VALID(0, PIN_GLOBAL | PIN_OFFSET_BIAS | (ggtt->vm.total - 4096)),
VALID(0, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_FIXED | (ggtt->mappable_end - 4096)),
INVALID(0, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_FIXED | ggtt->mappable_end),
VALID(0, PIN_GLOBAL | PIN_OFFSET_FIXED | (ggtt->vm.total - 4096)),
INVALID(0, PIN_GLOBAL | PIN_OFFSET_FIXED | ggtt->vm.total),
INVALID(0, PIN_GLOBAL | PIN_OFFSET_FIXED | round_down(U64_MAX, PAGE_SIZE)),
VALID(4096, PIN_GLOBAL),
VALID(8192, PIN_GLOBAL),
VALID(ggtt->mappable_end - 4096, PIN_GLOBAL | PIN_MAPPABLE),
VALID(ggtt->mappable_end, PIN_GLOBAL | PIN_MAPPABLE),
NOSPACE(ggtt->mappable_end + 4096, PIN_GLOBAL | PIN_MAPPABLE),
VALID(ggtt->vm.total - 4096, PIN_GLOBAL),
VALID(ggtt->vm.total, PIN_GLOBAL),
NOSPACE(ggtt->vm.total + 4096, PIN_GLOBAL),
NOSPACE(round_down(U64_MAX, PAGE_SIZE), PIN_GLOBAL),
INVALID(8192, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_FIXED | (ggtt->mappable_end - 4096)),
INVALID(8192, PIN_GLOBAL | PIN_OFFSET_FIXED | (ggtt->vm.total - 4096)),
INVALID(8192, PIN_GLOBAL | PIN_OFFSET_FIXED | (round_down(U64_MAX, PAGE_SIZE) - 4096)),
VALID(8192, PIN_GLOBAL | PIN_OFFSET_BIAS | (ggtt->mappable_end - 4096)),
#if !IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)
/* Misusing BIAS is a programming error (it is not controllable
* from userspace) so when debugging is enabled, it explodes.
* However, the tests are still quite interesting for checking
* variable start, end and size.
*/
NOSPACE(0, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_BIAS | ggtt->mappable_end),
NOSPACE(0, PIN_GLOBAL | PIN_OFFSET_BIAS | ggtt->vm.total),
NOSPACE(8192, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_BIAS | (ggtt->mappable_end - 4096)),
NOSPACE(8192, PIN_GLOBAL | PIN_OFFSET_BIAS | (ggtt->vm.total - 4096)),
#endif
{ },
#undef NOSPACE
#undef INVALID
#undef __INVALID
#undef VALID
}, *m;
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
int err = -EINVAL;
/* Exercise all the weird and wonderful i915_vma_pin requests,
* focusing on error handling of boundary conditions.
*/
GEM_BUG_ON(!drm_mm_clean(&ggtt->vm.mm));
obj = i915_gem_object_create_internal(ggtt->vm.i915, PAGE_SIZE);
if (IS_ERR(obj))
return PTR_ERR(obj);
vma = checked_vma_instance(obj, &ggtt->vm, NULL);
if (IS_ERR(vma))
goto out;
for (m = modes; m->assert; m++) {
err = i915_vma_pin(vma, m->size, 0, m->flags);
if (!m->assert(vma, m, err)) {
pr_err("%s to pin single page into GGTT with mode[%d:%s]: size=%llx flags=%llx, err=%d\n",
m->assert == assert_pin_valid ? "Failed" : "Unexpectedly succeeded",
(int)(m - modes), m->string, m->size, m->flags,
err);
if (!err)
i915_vma_unpin(vma);
err = -EINVAL;
goto out;
}
if (!err) {
i915_vma_unpin(vma);
err = i915_vma_unbind_unlocked(vma);
if (err) {
pr_err("Failed to unbind single page from GGTT, err=%d\n", err);
goto out;
}
}
cond_resched();
}
err = 0;
out:
i915_gem_object_put(obj);
return err;
}
static unsigned long rotated_index(const struct intel_rotation_info *r,
unsigned int n,
unsigned int x,
unsigned int y)
{
return (r->plane[n].src_stride * (r->plane[n].height - y - 1) +
r->plane[n].offset + x);
}
static struct scatterlist *
assert_rotated(struct drm_i915_gem_object *obj,
const struct intel_rotation_info *r, unsigned int n,
struct scatterlist *sg)
{
unsigned int x, y;
for (x = 0; x < r->plane[n].width; x++) {
unsigned int left;
for (y = 0; y < r->plane[n].height; y++) {
unsigned long src_idx;
dma_addr_t src;
if (!sg) {
pr_err("Invalid sg table: too short at plane %d, (%d, %d)!\n",
n, x, y);
return ERR_PTR(-EINVAL);
}
src_idx = rotated_index(r, n, x, y);
src = i915_gem_object_get_dma_address(obj, src_idx);
if (sg_dma_len(sg) != PAGE_SIZE) {
pr_err("Invalid sg.length, found %d, expected %lu for rotated page (%d, %d) [src index %lu]\n",
sg_dma_len(sg), PAGE_SIZE,
x, y, src_idx);
return ERR_PTR(-EINVAL);
}
if (sg_dma_address(sg) != src) {
pr_err("Invalid address for rotated page (%d, %d) [src index %lu]\n",
x, y, src_idx);
return ERR_PTR(-EINVAL);
}
sg = sg_next(sg);
}
left = (r->plane[n].dst_stride - y) * PAGE_SIZE;
if (!left)
continue;
if (!sg) {
pr_err("Invalid sg table: too short at plane %d, (%d, %d)!\n",
n, x, y);
return ERR_PTR(-EINVAL);
}
if (sg_dma_len(sg) != left) {
pr_err("Invalid sg.length, found %d, expected %u for rotated page (%d, %d)\n",
sg_dma_len(sg), left, x, y);
return ERR_PTR(-EINVAL);
}
if (sg_dma_address(sg) != 0) {
pr_err("Invalid address, found %pad, expected 0 for remapped page (%d, %d)\n",
&sg_dma_address(sg), x, y);
return ERR_PTR(-EINVAL);
}
sg = sg_next(sg);
}
return sg;
}
static unsigned long remapped_index(const struct intel_remapped_info *r,
unsigned int n,
unsigned int x,
unsigned int y)
{
return (r->plane[n].src_stride * y +
r->plane[n].offset + x);
}
static struct scatterlist *
assert_remapped(struct drm_i915_gem_object *obj,
const struct intel_remapped_info *r, unsigned int n,
struct scatterlist *sg)
{
unsigned int x, y;
unsigned int left = 0;
unsigned int offset;
for (y = 0; y < r->plane[n].height; y++) {
for (x = 0; x < r->plane[n].width; x++) {
unsigned long src_idx;
dma_addr_t src;
if (!sg) {
pr_err("Invalid sg table: too short at plane %d, (%d, %d)!\n",
n, x, y);
return ERR_PTR(-EINVAL);
}
if (!left) {
offset = 0;
left = sg_dma_len(sg);
}
src_idx = remapped_index(r, n, x, y);
src = i915_gem_object_get_dma_address(obj, src_idx);
if (left < PAGE_SIZE || left & (PAGE_SIZE-1)) {
pr_err("Invalid sg.length, found %d, expected %lu for remapped page (%d, %d) [src index %lu]\n",
sg_dma_len(sg), PAGE_SIZE,
x, y, src_idx);
return ERR_PTR(-EINVAL);
}
if (sg_dma_address(sg) + offset != src) {
pr_err("Invalid address for remapped page (%d, %d) [src index %lu]\n",
x, y, src_idx);
return ERR_PTR(-EINVAL);
}
left -= PAGE_SIZE;
offset += PAGE_SIZE;
if (!left)
sg = sg_next(sg);
}
if (left) {
pr_err("Unexpected sg tail with %d size for remapped page (%d, %d)\n",
left,
x, y);
return ERR_PTR(-EINVAL);
}
left = (r->plane[n].dst_stride - r->plane[n].width) * PAGE_SIZE;
if (!left)
continue;
if (!sg) {
pr_err("Invalid sg table: too short at plane %d, (%d, %d)!\n",
n, x, y);
return ERR_PTR(-EINVAL);
}
if (sg_dma_len(sg) != left) {
pr_err("Invalid sg.length, found %u, expected %u for remapped page (%d, %d)\n",
sg_dma_len(sg), left,
x, y);
return ERR_PTR(-EINVAL);
}
if (sg_dma_address(sg) != 0) {
pr_err("Invalid address, found %pad, expected 0 for remapped page (%d, %d)\n",
&sg_dma_address(sg),
x, y);
return ERR_PTR(-EINVAL);
}
sg = sg_next(sg);
left = 0;
}
return sg;
}
static unsigned int remapped_size(enum i915_gtt_view_type view_type,
const struct intel_remapped_plane_info *a,
const struct intel_remapped_plane_info *b)
{
if (view_type == I915_GTT_VIEW_ROTATED)
return a->dst_stride * a->width + b->dst_stride * b->width;
else
return a->dst_stride * a->height + b->dst_stride * b->height;
}
static int igt_vma_rotate_remap(void *arg)
{
struct i915_ggtt *ggtt = arg;
struct i915_address_space *vm = &ggtt->vm;
struct drm_i915_gem_object *obj;
const struct intel_remapped_plane_info planes[] = {
{ .width = 1, .height = 1, .src_stride = 1 },
{ .width = 2, .height = 2, .src_stride = 2 },
{ .width = 4, .height = 4, .src_stride = 4 },
{ .width = 8, .height = 8, .src_stride = 8 },
{ .width = 3, .height = 5, .src_stride = 3 },
{ .width = 3, .height = 5, .src_stride = 4 },
{ .width = 3, .height = 5, .src_stride = 5 },
{ .width = 5, .height = 3, .src_stride = 5 },
{ .width = 5, .height = 3, .src_stride = 7 },
{ .width = 5, .height = 3, .src_stride = 9 },
{ .width = 4, .height = 6, .src_stride = 6 },
{ .width = 6, .height = 4, .src_stride = 6 },
{ .width = 2, .height = 2, .src_stride = 2, .dst_stride = 2 },
{ .width = 3, .height = 3, .src_stride = 3, .dst_stride = 4 },
{ .width = 5, .height = 6, .src_stride = 7, .dst_stride = 8 },
{ }
}, *a, *b;
enum i915_gtt_view_type types[] = {
I915_GTT_VIEW_ROTATED,
I915_GTT_VIEW_REMAPPED,
0,
}, *t;
const unsigned int max_pages = 64;
int err = -ENOMEM;
/* Create VMA for many different combinations of planes and check
* that the page layout within the rotated VMA match our expectations.
*/
obj = i915_gem_object_create_internal(vm->i915, max_pages * PAGE_SIZE);
if (IS_ERR(obj))
goto out;
for (t = types; *t; t++) {
for (a = planes; a->width; a++) {
for (b = planes + ARRAY_SIZE(planes); b-- != planes; ) {
struct i915_gtt_view view = {
.type = *t,
.remapped.plane[0] = *a,
.remapped.plane[1] = *b,
};
struct intel_remapped_plane_info *plane_info = view.remapped.plane;
unsigned int n, max_offset;
max_offset = max(plane_info[0].src_stride * plane_info[0].height,
plane_info[1].src_stride * plane_info[1].height);
GEM_BUG_ON(max_offset > max_pages);
max_offset = max_pages - max_offset;
if (!plane_info[0].dst_stride)
plane_info[0].dst_stride = view.type == I915_GTT_VIEW_ROTATED ?
plane_info[0].height :
plane_info[0].width;
if (!plane_info[1].dst_stride)
plane_info[1].dst_stride = view.type == I915_GTT_VIEW_ROTATED ?
plane_info[1].height :
plane_info[1].width;
for_each_prime_number_from(plane_info[0].offset, 0, max_offset) {
for_each_prime_number_from(plane_info[1].offset, 0, max_offset) {
struct scatterlist *sg;
struct i915_vma *vma;
unsigned int expected_pages;
vma = checked_vma_instance(obj, vm, &view);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out_object;
}
err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL);
if (err) {
pr_err("Failed to pin VMA, err=%d\n", err);
goto out_object;
}
expected_pages = remapped_size(view.type, &plane_info[0], &plane_info[1]);
if (view.type == I915_GTT_VIEW_ROTATED &&
vma->size != expected_pages * PAGE_SIZE) {
pr_err("VMA is wrong size, expected %lu, found %llu\n",
PAGE_SIZE * expected_pages, vma->size);
err = -EINVAL;
goto out_object;
}
if (view.type == I915_GTT_VIEW_REMAPPED &&
vma->size > expected_pages * PAGE_SIZE) {
pr_err("VMA is wrong size, expected %lu, found %llu\n",
PAGE_SIZE * expected_pages, vma->size);
err = -EINVAL;
goto out_object;
}
if (vma->pages->nents > expected_pages) {
pr_err("sg table is wrong sizeo, expected %u, found %u nents\n",
expected_pages, vma->pages->nents);
err = -EINVAL;
goto out_object;
}
if (vma->node.size < vma->size) {
pr_err("VMA binding too small, expected %llu, found %llu\n",
vma->size, vma->node.size);
err = -EINVAL;
goto out_object;
}
if (vma->pages == obj->mm.pages) {
pr_err("VMA using unrotated object pages!\n");
err = -EINVAL;
goto out_object;
}
sg = vma->pages->sgl;
for (n = 0; n < ARRAY_SIZE(view.rotated.plane); n++) {
if (view.type == I915_GTT_VIEW_ROTATED)
sg = assert_rotated(obj, &view.rotated, n, sg);
else
sg = assert_remapped(obj, &view.remapped, n, sg);
if (IS_ERR(sg)) {
pr_err("Inconsistent %s VMA pages for plane %d: [(%d, %d, %d, %d, %d), (%d, %d, %d, %d, %d)]\n",
view.type == I915_GTT_VIEW_ROTATED ?
"rotated" : "remapped", n,
plane_info[0].width,
plane_info[0].height,
plane_info[0].src_stride,
plane_info[0].dst_stride,
plane_info[0].offset,
plane_info[1].width,
plane_info[1].height,
plane_info[1].src_stride,
plane_info[1].dst_stride,
plane_info[1].offset);
err = -EINVAL;
goto out_object;
}
}
i915_vma_unpin(vma);
err = i915_vma_unbind_unlocked(vma);
if (err) {
pr_err("Unbinding returned %i\n", err);
goto out_object;
}
cond_resched();
}
}
}
}
}
out_object:
i915_gem_object_put(obj);
out:
return err;
}
static bool assert_partial(struct drm_i915_gem_object *obj,
struct i915_vma *vma,
unsigned long offset,
unsigned long size)
{
struct sgt_iter sgt;
dma_addr_t dma;
for_each_sgt_daddr(dma, sgt, vma->pages) {
dma_addr_t src;
if (!size) {
pr_err("Partial scattergather list too long\n");
return false;
}
src = i915_gem_object_get_dma_address(obj, offset);
if (src != dma) {
pr_err("DMA mismatch for partial page offset %lu\n",
offset);
return false;
}
offset++;
size--;
}
return true;
}
static bool assert_pin(struct i915_vma *vma,
struct i915_gtt_view *view,
u64 size,
const char *name)
{
bool ok = true;
if (vma->size != size) {
pr_err("(%s) VMA is wrong size, expected %llu, found %llu\n",
name, size, vma->size);
ok = false;
}
if (vma->node.size < vma->size) {
pr_err("(%s) VMA binding too small, expected %llu, found %llu\n",
name, vma->size, vma->node.size);
ok = false;
}
if (view && view->type != I915_GTT_VIEW_NORMAL) {
if (memcmp(&vma->gtt_view, view, sizeof(*view))) {
pr_err("(%s) VMA mismatch upon creation!\n",
name);
ok = false;
}
if (vma->pages == vma->obj->mm.pages) {
pr_err("(%s) VMA using original object pages!\n",
name);
ok = false;
}
} else {
if (vma->gtt_view.type != I915_GTT_VIEW_NORMAL) {
pr_err("Not the normal ggtt view! Found %d\n",
vma->gtt_view.type);
ok = false;
}
if (vma->pages != vma->obj->mm.pages) {
pr_err("VMA not using object pages!\n");
ok = false;
}
}
return ok;
}
static int igt_vma_partial(void *arg)
{
struct i915_ggtt *ggtt = arg;
struct i915_address_space *vm = &ggtt->vm;
const unsigned int npages = 1021; /* prime! */
struct drm_i915_gem_object *obj;
const struct phase {
const char *name;
} phases[] = {
{ "create" },
{ "lookup" },
{ },
}, *p;
unsigned int sz, offset;
struct i915_vma *vma;
int err = -ENOMEM;
/* Create lots of different VMA for the object and check that
* we are returned the same VMA when we later request the same range.
*/
obj = i915_gem_object_create_internal(vm->i915, npages * PAGE_SIZE);
if (IS_ERR(obj))
goto out;
for (p = phases; p->name; p++) { /* exercise both create/lookup */
unsigned int count, nvma;
nvma = 0;
for_each_prime_number_from(sz, 1, npages) {
for_each_prime_number_from(offset, 0, npages - sz) {
struct i915_gtt_view view;
view.type = I915_GTT_VIEW_PARTIAL;
view.partial.offset = offset;
view.partial.size = sz;
if (sz == npages)
view.type = I915_GTT_VIEW_NORMAL;
vma = checked_vma_instance(obj, vm, &view);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out_object;
}
err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL);
if (err)
goto out_object;
if (!assert_pin(vma, &view, sz*PAGE_SIZE, p->name)) {
pr_err("(%s) Inconsistent partial pinning for (offset=%d, size=%d)\n",
p->name, offset, sz);
err = -EINVAL;
goto out_object;
}
if (!assert_partial(obj, vma, offset, sz)) {
pr_err("(%s) Inconsistent partial pages for (offset=%d, size=%d)\n",
p->name, offset, sz);
err = -EINVAL;
goto out_object;
}
i915_vma_unpin(vma);
nvma++;
err = i915_vma_unbind_unlocked(vma);
if (err) {
pr_err("Unbinding returned %i\n", err);
goto out_object;
}
cond_resched();
}
}
count = 0;
list_for_each_entry(vma, &obj->vma.list, obj_link)
count++;
if (count != nvma) {
pr_err("(%s) All partial vma were not recorded on the obj->vma_list: found %u, expected %u\n",
p->name, count, nvma);
err = -EINVAL;
goto out_object;
}
/* Check that we did create the whole object mapping */
vma = checked_vma_instance(obj, vm, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out_object;
}
err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL);
if (err)
goto out_object;
if (!assert_pin(vma, NULL, obj->base.size, p->name)) {
pr_err("(%s) inconsistent full pin\n", p->name);
err = -EINVAL;
goto out_object;
}
i915_vma_unpin(vma);
err = i915_vma_unbind_unlocked(vma);
if (err) {
pr_err("Unbinding returned %i\n", err);
goto out_object;
}
count = 0;
list_for_each_entry(vma, &obj->vma.list, obj_link)
count++;
if (count != nvma) {
pr_err("(%s) allocated an extra full vma!\n", p->name);
err = -EINVAL;
goto out_object;
}
}
out_object:
i915_gem_object_put(obj);
out:
return err;
}
int i915_vma_mock_selftests(void)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_vma_create),
SUBTEST(igt_vma_pin1),
SUBTEST(igt_vma_rotate_remap),
SUBTEST(igt_vma_partial),
};
struct drm_i915_private *i915;
struct intel_gt *gt;
int err;
i915 = mock_gem_device();
if (!i915)
return -ENOMEM;
/* allocate the ggtt */
err = intel_gt_assign_ggtt(to_gt(i915));
if (err)
goto out_put;
gt = to_gt(i915);
mock_init_ggtt(gt);
err = i915_subtests(tests, gt->ggtt);
mock_device_flush(i915);
i915_gem_drain_freed_objects(i915);
mock_fini_ggtt(gt->ggtt);
out_put:
mock_destroy_device(i915);
return err;
}
static int igt_vma_remapped_gtt(void *arg)
{
struct drm_i915_private *i915 = arg;
const struct intel_remapped_plane_info planes[] = {
{ .width = 1, .height = 1, .src_stride = 1 },
{ .width = 2, .height = 2, .src_stride = 2 },
{ .width = 4, .height = 4, .src_stride = 4 },
{ .width = 8, .height = 8, .src_stride = 8 },
{ .width = 3, .height = 5, .src_stride = 3 },
{ .width = 3, .height = 5, .src_stride = 4 },
{ .width = 3, .height = 5, .src_stride = 5 },
{ .width = 5, .height = 3, .src_stride = 5 },
{ .width = 5, .height = 3, .src_stride = 7 },
{ .width = 5, .height = 3, .src_stride = 9 },
{ .width = 4, .height = 6, .src_stride = 6 },
{ .width = 6, .height = 4, .src_stride = 6 },
{ .width = 2, .height = 2, .src_stride = 2, .dst_stride = 2 },
{ .width = 3, .height = 3, .src_stride = 3, .dst_stride = 4 },
{ .width = 5, .height = 6, .src_stride = 7, .dst_stride = 8 },
{ }
}, *p;
enum i915_gtt_view_type types[] = {
I915_GTT_VIEW_ROTATED,
I915_GTT_VIEW_REMAPPED,
0,
}, *t;
struct drm_i915_gem_object *obj;
intel_wakeref_t wakeref;
int err = 0;
if (!i915_ggtt_has_aperture(to_gt(i915)->ggtt))
return 0;
obj = i915_gem_object_create_internal(i915, 10 * 10 * PAGE_SIZE);
if (IS_ERR(obj))
return PTR_ERR(obj);
wakeref = intel_runtime_pm_get(&i915->runtime_pm);
for (t = types; *t; t++) {
for (p = planes; p->width; p++) {
struct i915_gtt_view view = {
.type = *t,
.rotated.plane[0] = *p,
};
struct intel_remapped_plane_info *plane_info = view.rotated.plane;
struct i915_vma *vma;
u32 __iomem *map;
unsigned int x, y;
i915_gem_object_lock(obj, NULL);
err = i915_gem_object_set_to_gtt_domain(obj, true);
i915_gem_object_unlock(obj);
if (err)
goto out;
if (!plane_info[0].dst_stride)
plane_info[0].dst_stride = *t == I915_GTT_VIEW_ROTATED ?
p->height : p->width;
vma = i915_gem_object_ggtt_pin(obj, &view, 0, 0, PIN_MAPPABLE);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out;
}
GEM_BUG_ON(vma->gtt_view.type != *t);
map = i915_vma_pin_iomap(vma);
i915_vma_unpin(vma);
if (IS_ERR(map)) {
err = PTR_ERR(map);
goto out;
}
for (y = 0 ; y < plane_info[0].height; y++) {
for (x = 0 ; x < plane_info[0].width; x++) {
unsigned int offset;
u32 val = y << 16 | x;
if (*t == I915_GTT_VIEW_ROTATED)
offset = (x * plane_info[0].dst_stride + y) * PAGE_SIZE;
else
offset = (y * plane_info[0].dst_stride + x) * PAGE_SIZE;
iowrite32(val, &map[offset / sizeof(*map)]);
}
}
i915_vma_unpin_iomap(vma);
vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, PIN_MAPPABLE);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out;
}
GEM_BUG_ON(vma->gtt_view.type != I915_GTT_VIEW_NORMAL);
map = i915_vma_pin_iomap(vma);
i915_vma_unpin(vma);
if (IS_ERR(map)) {
err = PTR_ERR(map);
goto out;
}
for (y = 0 ; y < plane_info[0].height; y++) {
for (x = 0 ; x < plane_info[0].width; x++) {
unsigned int offset, src_idx;
u32 exp = y << 16 | x;
u32 val;
if (*t == I915_GTT_VIEW_ROTATED)
src_idx = rotated_index(&view.rotated, 0, x, y);
else
src_idx = remapped_index(&view.remapped, 0, x, y);
offset = src_idx * PAGE_SIZE;
val = ioread32(&map[offset / sizeof(*map)]);
if (val != exp) {
pr_err("%s VMA write test failed, expected 0x%x, found 0x%x\n",
*t == I915_GTT_VIEW_ROTATED ? "Rotated" : "Remapped",
exp, val);
i915_vma_unpin_iomap(vma);
err = -EINVAL;
goto out;
}
}
}
i915_vma_unpin_iomap(vma);
cond_resched();
}
}
out:
intel_runtime_pm_put(&i915->runtime_pm, wakeref);
i915_gem_object_put(obj);
return err;
}
int i915_vma_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_vma_remapped_gtt),
};
return i915_live_subtests(tests, i915);
}