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OpenCloudOS-Kernel/drivers/gpu/drm/i915/i915_gem.c

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/*
* Copyright © 2008-2015 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.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
#include <drm/drm_vma_manager.h>
#include <drm/i915_drm.h>
#include <linux/dma-fence-array.h>
#include <linux/kthread.h>
#include <linux/reservation.h>
#include <linux/shmem_fs.h>
#include <linux/slab.h>
#include <linux/stop_machine.h>
#include <linux/swap.h>
#include <linux/pci.h>
#include <linux/dma-buf.h>
#include <linux/mman.h>
#include "display/intel_display.h"
#include "display/intel_frontbuffer.h"
#include "gem/i915_gem_clflush.h"
#include "gem/i915_gem_context.h"
#include "gem/i915_gem_ioctls.h"
#include "gem/i915_gem_pm.h"
#include "gem/i915_gemfs.h"
#include "gt/intel_gt.h"
#include "gt/intel_gt_pm.h"
#include "gt/intel_mocs.h"
#include "gt/intel_reset.h"
#include "gt/intel_workarounds.h"
#include "i915_drv.h"
#include "i915_scatterlist.h"
#include "i915_trace.h"
#include "i915_vgpu.h"
#include "intel_drv.h"
#include "intel_pm.h"
static int
insert_mappable_node(struct i915_ggtt *ggtt,
struct drm_mm_node *node, u32 size)
{
memset(node, 0, sizeof(*node));
return drm_mm_insert_node_in_range(&ggtt->vm.mm, node,
size, 0, I915_COLOR_UNEVICTABLE,
0, ggtt->mappable_end,
DRM_MM_INSERT_LOW);
}
static void
remove_mappable_node(struct drm_mm_node *node)
{
drm_mm_remove_node(node);
}
int
i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct i915_ggtt *ggtt = &to_i915(dev)->ggtt;
struct drm_i915_gem_get_aperture *args = data;
struct i915_vma *vma;
u64 pinned;
mutex_lock(&ggtt->vm.mutex);
pinned = ggtt->vm.reserved;
list_for_each_entry(vma, &ggtt->vm.bound_list, vm_link)
if (i915_vma_is_pinned(vma))
pinned += vma->node.size;
mutex_unlock(&ggtt->vm.mutex);
args->aper_size = ggtt->vm.total;
args->aper_available_size = args->aper_size - pinned;
return 0;
}
int i915_gem_object_unbind(struct drm_i915_gem_object *obj,
unsigned long flags)
{
struct i915_vma *vma;
LIST_HEAD(still_in_list);
int ret = 0;
lockdep_assert_held(&obj->base.dev->struct_mutex);
spin_lock(&obj->vma.lock);
while (!ret && (vma = list_first_entry_or_null(&obj->vma.list,
struct i915_vma,
obj_link))) {
list_move_tail(&vma->obj_link, &still_in_list);
spin_unlock(&obj->vma.lock);
ret = -EBUSY;
if (flags & I915_GEM_OBJECT_UNBIND_ACTIVE ||
!i915_vma_is_active(vma))
ret = i915_vma_unbind(vma);
spin_lock(&obj->vma.lock);
}
list_splice(&still_in_list, &obj->vma.list);
spin_unlock(&obj->vma.lock);
return ret;
}
static int
i915_gem_phys_pwrite(struct drm_i915_gem_object *obj,
struct drm_i915_gem_pwrite *args,
struct drm_file *file)
{
void *vaddr = obj->phys_handle->vaddr + args->offset;
char __user *user_data = u64_to_user_ptr(args->data_ptr);
/* We manually control the domain here and pretend that it
* remains coherent i.e. in the GTT domain, like shmem_pwrite.
*/
intel_fb_obj_invalidate(obj, ORIGIN_CPU);
if (copy_from_user(vaddr, user_data, args->size))
return -EFAULT;
drm_clflush_virt_range(vaddr, args->size);
intel_gt_chipset_flush(&to_i915(obj->base.dev)->gt);
intel_fb_obj_flush(obj, ORIGIN_CPU);
return 0;
}
static int
i915_gem_create(struct drm_file *file,
struct drm_i915_private *dev_priv,
u64 *size_p,
u32 *handle_p)
{
struct drm_i915_gem_object *obj;
u32 handle;
u64 size;
int ret;
size = round_up(*size_p, PAGE_SIZE);
if (size == 0)
return -EINVAL;
/* Allocate the new object */
obj = i915_gem_object_create_shmem(dev_priv, size);
if (IS_ERR(obj))
return PTR_ERR(obj);
ret = drm_gem_handle_create(file, &obj->base, &handle);
/* drop reference from allocate - handle holds it now */
i915_gem_object_put(obj);
if (ret)
return ret;
*handle_p = handle;
*size_p = size;
return 0;
}
int
i915_gem_dumb_create(struct drm_file *file,
struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
int cpp = DIV_ROUND_UP(args->bpp, 8);
u32 format;
switch (cpp) {
case 1:
format = DRM_FORMAT_C8;
break;
case 2:
format = DRM_FORMAT_RGB565;
break;
case 4:
format = DRM_FORMAT_XRGB8888;
break;
default:
return -EINVAL;
}
/* have to work out size/pitch and return them */
args->pitch = ALIGN(args->width * cpp, 64);
/* align stride to page size so that we can remap */
if (args->pitch > intel_plane_fb_max_stride(to_i915(dev), format,
DRM_FORMAT_MOD_LINEAR))
args->pitch = ALIGN(args->pitch, 4096);
args->size = args->pitch * args->height;
return i915_gem_create(file, to_i915(dev),
&args->size, &args->handle);
}
/**
* Creates a new mm object and returns a handle to it.
* @dev: drm device pointer
* @data: ioctl data blob
* @file: drm file pointer
*/
int
i915_gem_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct drm_i915_gem_create *args = data;
i915_gem_flush_free_objects(dev_priv);
return i915_gem_create(file, dev_priv,
&args->size, &args->handle);
}
static int
shmem_pread(struct page *page, int offset, int len, char __user *user_data,
bool needs_clflush)
{
char *vaddr;
int ret;
vaddr = kmap(page);
if (needs_clflush)
drm_clflush_virt_range(vaddr + offset, len);
ret = __copy_to_user(user_data, vaddr + offset, len);
kunmap(page);
return ret ? -EFAULT : 0;
}
static int
i915_gem_shmem_pread(struct drm_i915_gem_object *obj,
struct drm_i915_gem_pread *args)
{
unsigned int needs_clflush;
unsigned int idx, offset;
struct dma_fence *fence;
char __user *user_data;
u64 remain;
int ret;
ret = i915_gem_object_prepare_read(obj, &needs_clflush);
if (ret)
return ret;
fence = i915_gem_object_lock_fence(obj);
i915_gem_object_finish_access(obj);
if (!fence)
return -ENOMEM;
remain = args->size;
user_data = u64_to_user_ptr(args->data_ptr);
offset = offset_in_page(args->offset);
for (idx = args->offset >> PAGE_SHIFT; remain; idx++) {
struct page *page = i915_gem_object_get_page(obj, idx);
unsigned int length = min_t(u64, remain, PAGE_SIZE - offset);
ret = shmem_pread(page, offset, length, user_data,
needs_clflush);
if (ret)
break;
remain -= length;
user_data += length;
offset = 0;
}
i915_gem_object_unlock_fence(obj, fence);
return ret;
}
static inline bool
gtt_user_read(struct io_mapping *mapping,
loff_t base, int offset,
char __user *user_data, int length)
{
void __iomem *vaddr;
unsigned long unwritten;
/* We can use the cpu mem copy function because this is X86. */
vaddr = io_mapping_map_atomic_wc(mapping, base);
unwritten = __copy_to_user_inatomic(user_data,
(void __force *)vaddr + offset,
length);
io_mapping_unmap_atomic(vaddr);
if (unwritten) {
vaddr = io_mapping_map_wc(mapping, base, PAGE_SIZE);
unwritten = copy_to_user(user_data,
(void __force *)vaddr + offset,
length);
io_mapping_unmap(vaddr);
}
return unwritten;
}
static int
i915_gem_gtt_pread(struct drm_i915_gem_object *obj,
const struct drm_i915_gem_pread *args)
{
struct drm_i915_private *i915 = to_i915(obj->base.dev);
struct i915_ggtt *ggtt = &i915->ggtt;
intel_wakeref_t wakeref;
struct drm_mm_node node;
struct dma_fence *fence;
void __user *user_data;
struct i915_vma *vma;
u64 remain, offset;
int ret;
ret = mutex_lock_interruptible(&i915->drm.struct_mutex);
if (ret)
return ret;
wakeref = intel_runtime_pm_get(&i915->runtime_pm);
vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0,
PIN_MAPPABLE |
PIN_NONFAULT |
PIN_NONBLOCK);
if (!IS_ERR(vma)) {
node.start = i915_ggtt_offset(vma);
node.allocated = false;
ret = i915_vma_put_fence(vma);
if (ret) {
i915_vma_unpin(vma);
vma = ERR_PTR(ret);
}
}
if (IS_ERR(vma)) {
ret = insert_mappable_node(ggtt, &node, PAGE_SIZE);
if (ret)
goto out_unlock;
GEM_BUG_ON(!node.allocated);
}
mutex_unlock(&i915->drm.struct_mutex);
ret = i915_gem_object_lock_interruptible(obj);
if (ret)
goto out_unpin;
ret = i915_gem_object_set_to_gtt_domain(obj, false);
if (ret) {
i915_gem_object_unlock(obj);
goto out_unpin;
}
fence = i915_gem_object_lock_fence(obj);
i915_gem_object_unlock(obj);
if (!fence) {
ret = -ENOMEM;
goto out_unpin;
}
user_data = u64_to_user_ptr(args->data_ptr);
remain = args->size;
offset = args->offset;
while (remain > 0) {
/* Operation in this page
*
* page_base = page offset within aperture
* page_offset = offset within page
* page_length = bytes to copy for this page
*/
u32 page_base = node.start;
unsigned page_offset = offset_in_page(offset);
unsigned page_length = PAGE_SIZE - page_offset;
page_length = remain < page_length ? remain : page_length;
if (node.allocated) {
wmb();
ggtt->vm.insert_page(&ggtt->vm,
i915_gem_object_get_dma_address(obj, offset >> PAGE_SHIFT),
node.start, I915_CACHE_NONE, 0);
wmb();
} else {
page_base += offset & PAGE_MASK;
}
if (gtt_user_read(&ggtt->iomap, page_base, page_offset,
user_data, page_length)) {
ret = -EFAULT;
break;
}
remain -= page_length;
user_data += page_length;
offset += page_length;
}
i915_gem_object_unlock_fence(obj, fence);
out_unpin:
mutex_lock(&i915->drm.struct_mutex);
if (node.allocated) {
wmb();
ggtt->vm.clear_range(&ggtt->vm, node.start, node.size);
remove_mappable_node(&node);
} else {
i915_vma_unpin(vma);
}
out_unlock:
intel_runtime_pm_put(&i915->runtime_pm, wakeref);
mutex_unlock(&i915->drm.struct_mutex);
return ret;
}
/**
* Reads data from the object referenced by handle.
* @dev: drm device pointer
* @data: ioctl data blob
* @file: drm file pointer
*
* On error, the contents of *data are undefined.
*/
int
i915_gem_pread_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_gem_pread *args = data;
struct drm_i915_gem_object *obj;
int ret;
if (args->size == 0)
return 0;
if (!access_ok(u64_to_user_ptr(args->data_ptr),
args->size))
return -EFAULT;
obj = i915_gem_object_lookup(file, args->handle);
if (!obj)
return -ENOENT;
/* Bounds check source. */
if (range_overflows_t(u64, args->offset, args->size, obj->base.size)) {
ret = -EINVAL;
goto out;
}
trace_i915_gem_object_pread(obj, args->offset, args->size);
ret = i915_gem_object_wait(obj,
I915_WAIT_INTERRUPTIBLE,
MAX_SCHEDULE_TIMEOUT);
if (ret)
goto out;
ret = i915_gem_object_pin_pages(obj);
if (ret)
goto out;
ret = i915_gem_shmem_pread(obj, args);
if (ret == -EFAULT || ret == -ENODEV)
ret = i915_gem_gtt_pread(obj, args);
i915_gem_object_unpin_pages(obj);
out:
i915_gem_object_put(obj);
return ret;
}
/* This is the fast write path which cannot handle
* page faults in the source data
*/
static inline bool
ggtt_write(struct io_mapping *mapping,
loff_t base, int offset,
char __user *user_data, int length)
{
void __iomem *vaddr;
unsigned long unwritten;
/* We can use the cpu mem copy function because this is X86. */
vaddr = io_mapping_map_atomic_wc(mapping, base);
unwritten = __copy_from_user_inatomic_nocache((void __force *)vaddr + offset,
user_data, length);
io_mapping_unmap_atomic(vaddr);
if (unwritten) {
vaddr = io_mapping_map_wc(mapping, base, PAGE_SIZE);
unwritten = copy_from_user((void __force *)vaddr + offset,
user_data, length);
io_mapping_unmap(vaddr);
}
return unwritten;
}
/**
* This is the fast pwrite path, where we copy the data directly from the
* user into the GTT, uncached.
* @obj: i915 GEM object
* @args: pwrite arguments structure
*/
static int
i915_gem_gtt_pwrite_fast(struct drm_i915_gem_object *obj,
const struct drm_i915_gem_pwrite *args)
{
struct drm_i915_private *i915 = to_i915(obj->base.dev);
struct i915_ggtt *ggtt = &i915->ggtt;
struct intel_runtime_pm *rpm = &i915->runtime_pm;
intel_wakeref_t wakeref;
struct drm_mm_node node;
struct dma_fence *fence;
struct i915_vma *vma;
u64 remain, offset;
void __user *user_data;
int ret;
ret = mutex_lock_interruptible(&i915->drm.struct_mutex);
if (ret)
return ret;
if (i915_gem_object_has_struct_page(obj)) {
/*
* Avoid waking the device up if we can fallback, as
* waking/resuming is very slow (worst-case 10-100 ms
* depending on PCI sleeps and our own resume time).
* This easily dwarfs any performance advantage from
* using the cache bypass of indirect GGTT access.
*/
wakeref = intel_runtime_pm_get_if_in_use(rpm);
if (!wakeref) {
ret = -EFAULT;
goto out_unlock;
}
} else {
/* No backing pages, no fallback, we must force GGTT access */
wakeref = intel_runtime_pm_get(rpm);
}
vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0,
PIN_MAPPABLE |
PIN_NONFAULT |
PIN_NONBLOCK);
if (!IS_ERR(vma)) {
node.start = i915_ggtt_offset(vma);
node.allocated = false;
ret = i915_vma_put_fence(vma);
if (ret) {
i915_vma_unpin(vma);
vma = ERR_PTR(ret);
}
}
if (IS_ERR(vma)) {
ret = insert_mappable_node(ggtt, &node, PAGE_SIZE);
if (ret)
goto out_rpm;
GEM_BUG_ON(!node.allocated);
}
mutex_unlock(&i915->drm.struct_mutex);
ret = i915_gem_object_lock_interruptible(obj);
if (ret)
goto out_unpin;
ret = i915_gem_object_set_to_gtt_domain(obj, true);
if (ret) {
i915_gem_object_unlock(obj);
goto out_unpin;
}
fence = i915_gem_object_lock_fence(obj);
i915_gem_object_unlock(obj);
if (!fence) {
ret = -ENOMEM;
goto out_unpin;
}
intel_fb_obj_invalidate(obj, ORIGIN_CPU);
user_data = u64_to_user_ptr(args->data_ptr);
offset = args->offset;
remain = args->size;
while (remain) {
/* Operation in this page
*
* page_base = page offset within aperture
* page_offset = offset within page
* page_length = bytes to copy for this page
*/
u32 page_base = node.start;
unsigned int page_offset = offset_in_page(offset);
unsigned int page_length = PAGE_SIZE - page_offset;
page_length = remain < page_length ? remain : page_length;
if (node.allocated) {
wmb(); /* flush the write before we modify the GGTT */
ggtt->vm.insert_page(&ggtt->vm,
i915_gem_object_get_dma_address(obj, offset >> PAGE_SHIFT),
node.start, I915_CACHE_NONE, 0);
wmb(); /* flush modifications to the GGTT (insert_page) */
} else {
page_base += offset & PAGE_MASK;
}
/* If we get a fault while copying data, then (presumably) our
* source page isn't available. Return the error and we'll
* retry in the slow path.
* If the object is non-shmem backed, we retry again with the
* path that handles page fault.
*/
if (ggtt_write(&ggtt->iomap, page_base, page_offset,
user_data, page_length)) {
ret = -EFAULT;
break;
}
remain -= page_length;
user_data += page_length;
offset += page_length;
}
intel_fb_obj_flush(obj, ORIGIN_CPU);
i915_gem_object_unlock_fence(obj, fence);
out_unpin:
mutex_lock(&i915->drm.struct_mutex);
if (node.allocated) {
wmb();
ggtt->vm.clear_range(&ggtt->vm, node.start, node.size);
remove_mappable_node(&node);
} else {
i915_vma_unpin(vma);
}
out_rpm:
intel_runtime_pm_put(rpm, wakeref);
out_unlock:
mutex_unlock(&i915->drm.struct_mutex);
return ret;
}
/* Per-page copy function for the shmem pwrite fastpath.
* Flushes invalid cachelines before writing to the target if
* needs_clflush_before is set and flushes out any written cachelines after
* writing if needs_clflush is set.
*/
static int
shmem_pwrite(struct page *page, int offset, int len, char __user *user_data,
bool needs_clflush_before,
bool needs_clflush_after)
{
char *vaddr;
int ret;
vaddr = kmap(page);
if (needs_clflush_before)
drm_clflush_virt_range(vaddr + offset, len);
ret = __copy_from_user(vaddr + offset, user_data, len);
if (!ret && needs_clflush_after)
drm_clflush_virt_range(vaddr + offset, len);
kunmap(page);
return ret ? -EFAULT : 0;
}
static int
i915_gem_shmem_pwrite(struct drm_i915_gem_object *obj,
const struct drm_i915_gem_pwrite *args)
{
unsigned int partial_cacheline_write;
unsigned int needs_clflush;
unsigned int offset, idx;
struct dma_fence *fence;
void __user *user_data;
u64 remain;
int ret;
ret = i915_gem_object_prepare_write(obj, &needs_clflush);
if (ret)
return ret;
fence = i915_gem_object_lock_fence(obj);
i915_gem_object_finish_access(obj);
if (!fence)
return -ENOMEM;
/* If we don't overwrite a cacheline completely we need to be
* careful to have up-to-date data by first clflushing. Don't
* overcomplicate things and flush the entire patch.
*/
partial_cacheline_write = 0;
if (needs_clflush & CLFLUSH_BEFORE)
partial_cacheline_write = boot_cpu_data.x86_clflush_size - 1;
user_data = u64_to_user_ptr(args->data_ptr);
remain = args->size;
offset = offset_in_page(args->offset);
for (idx = args->offset >> PAGE_SHIFT; remain; idx++) {
struct page *page = i915_gem_object_get_page(obj, idx);
unsigned int length = min_t(u64, remain, PAGE_SIZE - offset);
ret = shmem_pwrite(page, offset, length, user_data,
(offset | length) & partial_cacheline_write,
needs_clflush & CLFLUSH_AFTER);
if (ret)
break;
remain -= length;
user_data += length;
offset = 0;
}
intel_fb_obj_flush(obj, ORIGIN_CPU);
i915_gem_object_unlock_fence(obj, fence);
return ret;
}
/**
* Writes data to the object referenced by handle.
* @dev: drm device
* @data: ioctl data blob
* @file: drm file
*
* On error, the contents of the buffer that were to be modified are undefined.
*/
int
i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_gem_pwrite *args = data;
struct drm_i915_gem_object *obj;
int ret;
if (args->size == 0)
return 0;
if (!access_ok(u64_to_user_ptr(args->data_ptr), args->size))
return -EFAULT;
obj = i915_gem_object_lookup(file, args->handle);
if (!obj)
return -ENOENT;
/* Bounds check destination. */
if (range_overflows_t(u64, args->offset, args->size, obj->base.size)) {
ret = -EINVAL;
goto err;
}
/* Writes not allowed into this read-only object */
if (i915_gem_object_is_readonly(obj)) {
ret = -EINVAL;
goto err;
}
trace_i915_gem_object_pwrite(obj, args->offset, args->size);
ret = -ENODEV;
if (obj->ops->pwrite)
ret = obj->ops->pwrite(obj, args);
if (ret != -ENODEV)
goto err;
ret = i915_gem_object_wait(obj,
I915_WAIT_INTERRUPTIBLE |
I915_WAIT_ALL,
MAX_SCHEDULE_TIMEOUT);
if (ret)
goto err;
ret = i915_gem_object_pin_pages(obj);
if (ret)
goto err;
ret = -EFAULT;
/* We can only do the GTT pwrite on untiled buffers, as otherwise
* it would end up going through the fenced access, and we'll get
* different detiling behavior between reading and writing.
* pread/pwrite currently are reading and writing from the CPU
* perspective, requiring manual detiling by the client.
*/
if (!i915_gem_object_has_struct_page(obj) ||
cpu_write_needs_clflush(obj))
/* Note that the gtt paths might fail with non-page-backed user
* pointers (e.g. gtt mappings when moving data between
* textures). Fallback to the shmem path in that case.
*/
ret = i915_gem_gtt_pwrite_fast(obj, args);
if (ret == -EFAULT || ret == -ENOSPC) {
if (obj->phys_handle)
ret = i915_gem_phys_pwrite(obj, args, file);
else
ret = i915_gem_shmem_pwrite(obj, args);
}
i915_gem_object_unpin_pages(obj);
err:
i915_gem_object_put(obj);
return ret;
}
/**
* Called when user space has done writes to this buffer
* @dev: drm device
* @data: ioctl data blob
* @file: drm file
*/
int
i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_gem_sw_finish *args = data;
struct drm_i915_gem_object *obj;
obj = i915_gem_object_lookup(file, args->handle);
if (!obj)
return -ENOENT;
/*
* Proxy objects are barred from CPU access, so there is no
* need to ban sw_finish as it is a nop.
*/
/* Pinned buffers may be scanout, so flush the cache */
i915_gem_object_flush_if_display(obj);
i915_gem_object_put(obj);
return 0;
}
void i915_gem_runtime_suspend(struct drm_i915_private *i915)
{
struct drm_i915_gem_object *obj, *on;
int i;
/*
* Only called during RPM suspend. All users of the userfault_list
* must be holding an RPM wakeref to ensure that this can not
* run concurrently with themselves (and use the struct_mutex for
* protection between themselves).
*/
list_for_each_entry_safe(obj, on,
&i915->ggtt.userfault_list, userfault_link)
__i915_gem_object_release_mmap(obj);
/*
* The fence will be lost when the device powers down. If any were
* in use by hardware (i.e. they are pinned), we should not be powering
* down! All other fences will be reacquired by the user upon waking.
*/
for (i = 0; i < i915->ggtt.num_fences; i++) {
struct i915_fence_reg *reg = &i915->ggtt.fence_regs[i];
/*
* Ideally we want to assert that the fence register is not
* live at this point (i.e. that no piece of code will be
* trying to write through fence + GTT, as that both violates
* our tracking of activity and associated locking/barriers,
* but also is illegal given that the hw is powered down).
*
* Previously we used reg->pin_count as a "liveness" indicator.
* That is not sufficient, and we need a more fine-grained
* tool if we want to have a sanity check here.
*/
if (!reg->vma)
continue;
GEM_BUG_ON(i915_vma_has_userfault(reg->vma));
reg->dirty = true;
}
}
static int wait_for_engines(struct drm_i915_private *i915)
{
if (wait_for(intel_engines_are_idle(i915), I915_IDLE_ENGINES_TIMEOUT)) {
dev_err(i915->drm.dev,
"Failed to idle engines, declaring wedged!\n");
GEM_TRACE_DUMP();
i915_gem_set_wedged(i915);
return -EIO;
}
return 0;
}
static long
wait_for_timelines(struct drm_i915_private *i915,
unsigned int flags, long timeout)
{
struct intel_gt_timelines *gt = &i915->gt.timelines;
struct intel_timeline *tl;
mutex_lock(&gt->mutex);
list_for_each_entry(tl, &gt->active_list, link) {
struct i915_request *rq;
rq = i915_active_request_get_unlocked(&tl->last_request);
if (!rq)
continue;
mutex_unlock(&gt->mutex);
/*
* "Race-to-idle".
*
* Switching to the kernel context is often used a synchronous
* step prior to idling, e.g. in suspend for flushing all
* current operations to memory before sleeping. These we
* want to complete as quickly as possible to avoid prolonged
* stalls, so allow the gpu to boost to maximum clocks.
*/
if (flags & I915_WAIT_FOR_IDLE_BOOST)
gen6_rps_boost(rq);
timeout = i915_request_wait(rq, flags, timeout);
i915_request_put(rq);
if (timeout < 0)
return timeout;
/* restart after reacquiring the lock */
mutex_lock(&gt->mutex);
tl = list_entry(&gt->active_list, typeof(*tl), link);
}
mutex_unlock(&gt->mutex);
return timeout;
}
int i915_gem_wait_for_idle(struct drm_i915_private *i915,
unsigned int flags, long timeout)
{
GEM_TRACE("flags=%x (%s), timeout=%ld%s, awake?=%s\n",
flags, flags & I915_WAIT_LOCKED ? "locked" : "unlocked",
timeout, timeout == MAX_SCHEDULE_TIMEOUT ? " (forever)" : "",
yesno(i915->gt.awake));
/* If the device is asleep, we have no requests outstanding */
if (!READ_ONCE(i915->gt.awake))
return 0;
timeout = wait_for_timelines(i915, flags, timeout);
if (timeout < 0)
return timeout;
if (flags & I915_WAIT_LOCKED) {
int err;
lockdep_assert_held(&i915->drm.struct_mutex);
err = wait_for_engines(i915);
if (err)
return err;
i915_retire_requests(i915);
}
return 0;
}
struct i915_vma *
i915_gem_object_ggtt_pin(struct drm_i915_gem_object *obj,
const struct i915_ggtt_view *view,
u64 size,
u64 alignment,
u64 flags)
{
struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
struct i915_address_space *vm = &dev_priv->ggtt.vm;
struct i915_vma *vma;
int ret;
lockdep_assert_held(&obj->base.dev->struct_mutex);
if (flags & PIN_MAPPABLE &&
(!view || view->type == I915_GGTT_VIEW_NORMAL)) {
/* If the required space is larger than the available
* aperture, we will not able to find a slot for the
* object and unbinding the object now will be in
* vain. Worse, doing so may cause us to ping-pong
* the object in and out of the Global GTT and
* waste a lot of cycles under the mutex.
*/
if (obj->base.size > dev_priv->ggtt.mappable_end)
return ERR_PTR(-E2BIG);
/* If NONBLOCK is set the caller is optimistically
* trying to cache the full object within the mappable
* aperture, and *must* have a fallback in place for
* situations where we cannot bind the object. We
* can be a little more lax here and use the fallback
* more often to avoid costly migrations of ourselves
* and other objects within the aperture.
*
* Half-the-aperture is used as a simple heuristic.
* More interesting would to do search for a free
* block prior to making the commitment to unbind.
* That caters for the self-harm case, and with a
* little more heuristics (e.g. NOFAULT, NOEVICT)
* we could try to minimise harm to others.
*/
if (flags & PIN_NONBLOCK &&
obj->base.size > dev_priv->ggtt.mappable_end / 2)
return ERR_PTR(-ENOSPC);
}
vma = i915_vma_instance(obj, vm, view);
if (IS_ERR(vma))
return vma;
if (i915_vma_misplaced(vma, size, alignment, flags)) {
if (flags & PIN_NONBLOCK) {
if (i915_vma_is_pinned(vma) || i915_vma_is_active(vma))
return ERR_PTR(-ENOSPC);
if (flags & PIN_MAPPABLE &&
vma->fence_size > dev_priv->ggtt.mappable_end / 2)
return ERR_PTR(-ENOSPC);
}
WARN(i915_vma_is_pinned(vma),
"bo is already pinned in ggtt with incorrect alignment:"
" offset=%08x, req.alignment=%llx,"
" req.map_and_fenceable=%d, vma->map_and_fenceable=%d\n",
i915_ggtt_offset(vma), alignment,
!!(flags & PIN_MAPPABLE),
i915_vma_is_map_and_fenceable(vma));
ret = i915_vma_unbind(vma);
if (ret)
return ERR_PTR(ret);
}
ret = i915_vma_pin(vma, size, alignment, flags | PIN_GLOBAL);
if (ret)
return ERR_PTR(ret);
return vma;
}
int
i915_gem_madvise_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_i915_private *i915 = to_i915(dev);
struct drm_i915_gem_madvise *args = data;
struct drm_i915_gem_object *obj;
int err;
switch (args->madv) {
case I915_MADV_DONTNEED:
case I915_MADV_WILLNEED:
break;
default:
return -EINVAL;
}
obj = i915_gem_object_lookup(file_priv, args->handle);
if (!obj)
return -ENOENT;
err = mutex_lock_interruptible(&obj->mm.lock);
if (err)
goto out;
if (i915_gem_object_has_pages(obj) &&
i915_gem_object_is_tiled(obj) &&
i915->quirks & QUIRK_PIN_SWIZZLED_PAGES) {
if (obj->mm.madv == I915_MADV_WILLNEED) {
GEM_BUG_ON(!obj->mm.quirked);
__i915_gem_object_unpin_pages(obj);
obj->mm.quirked = false;
}
if (args->madv == I915_MADV_WILLNEED) {
GEM_BUG_ON(obj->mm.quirked);
__i915_gem_object_pin_pages(obj);
obj->mm.quirked = true;
}
}
if (obj->mm.madv != __I915_MADV_PURGED)
obj->mm.madv = args->madv;
if (i915_gem_object_has_pages(obj)) {
struct list_head *list;
if (i915_gem_object_is_shrinkable(obj)) {
unsigned long flags;
spin_lock_irqsave(&i915->mm.obj_lock, flags);
if (obj->mm.madv != I915_MADV_WILLNEED)
list = &i915->mm.purge_list;
else
list = &i915->mm.shrink_list;
list_move_tail(&obj->mm.link, list);
spin_unlock_irqrestore(&i915->mm.obj_lock, flags);
}
}
/* if the object is no longer attached, discard its backing storage */
if (obj->mm.madv == I915_MADV_DONTNEED &&
!i915_gem_object_has_pages(obj))
i915_gem_object_truncate(obj);
args->retained = obj->mm.madv != __I915_MADV_PURGED;
mutex_unlock(&obj->mm.lock);
out:
i915_gem_object_put(obj);
return err;
}
void i915_gem_sanitize(struct drm_i915_private *i915)
{
intel_wakeref_t wakeref;
GEM_TRACE("\n");
wakeref = intel_runtime_pm_get(&i915->runtime_pm);
intel_uncore_forcewake_get(&i915->uncore, FORCEWAKE_ALL);
/*
* As we have just resumed the machine and woken the device up from
* deep PCI sleep (presumably D3_cold), assume the HW has been reset
* back to defaults, recovering from whatever wedged state we left it
* in and so worth trying to use the device once more.
*/
if (i915_terminally_wedged(i915))
i915_gem_unset_wedged(i915);
/*
* If we inherit context state from the BIOS or earlier occupants
* of the GPU, the GPU may be in an inconsistent state when we
* try to take over. The only way to remove the earlier state
* is by resetting. However, resetting on earlier gen is tricky as
* it may impact the display and we are uncertain about the stability
* of the reset, so this could be applied to even earlier gen.
*/
intel_gt_sanitize(&i915->gt, false);
intel_uncore_forcewake_put(&i915->uncore, FORCEWAKE_ALL);
intel_runtime_pm_put(&i915->runtime_pm, wakeref);
}
static void init_unused_ring(struct intel_gt *gt, u32 base)
{
struct intel_uncore *uncore = gt->uncore;
intel_uncore_write(uncore, RING_CTL(base), 0);
intel_uncore_write(uncore, RING_HEAD(base), 0);
intel_uncore_write(uncore, RING_TAIL(base), 0);
intel_uncore_write(uncore, RING_START(base), 0);
}
static void init_unused_rings(struct intel_gt *gt)
{
struct drm_i915_private *i915 = gt->i915;
if (IS_I830(i915)) {
init_unused_ring(gt, PRB1_BASE);
init_unused_ring(gt, SRB0_BASE);
init_unused_ring(gt, SRB1_BASE);
init_unused_ring(gt, SRB2_BASE);
init_unused_ring(gt, SRB3_BASE);
} else if (IS_GEN(i915, 2)) {
init_unused_ring(gt, SRB0_BASE);
init_unused_ring(gt, SRB1_BASE);
} else if (IS_GEN(i915, 3)) {
init_unused_ring(gt, PRB1_BASE);
init_unused_ring(gt, PRB2_BASE);
}
}
int i915_gem_init_hw(struct drm_i915_private *i915)
{
struct intel_uncore *uncore = &i915->uncore;
struct intel_gt *gt = &i915->gt;
int ret;
BUG_ON(!i915->kernel_context);
ret = i915_terminally_wedged(i915);
if (ret)
return ret;
gt->last_init_time = ktime_get();
/* Double layer security blanket, see i915_gem_init() */
intel_uncore_forcewake_get(uncore, FORCEWAKE_ALL);
if (HAS_EDRAM(i915) && INTEL_GEN(i915) < 9)
intel_uncore_rmw(uncore, HSW_IDICR, 0, IDIHASHMSK(0xf));
if (IS_HASWELL(i915))
intel_uncore_write(uncore,
MI_PREDICATE_RESULT_2,
IS_HSW_GT3(i915) ?
LOWER_SLICE_ENABLED : LOWER_SLICE_DISABLED);
/* Apply the GT workarounds... */
intel_gt_apply_workarounds(gt);
/* ...and determine whether they are sticking. */
intel_gt_verify_workarounds(gt, "init");
intel_gt_init_swizzling(gt);
/*
* At least 830 can leave some of the unused rings
* "active" (ie. head != tail) after resume which
* will prevent c3 entry. Makes sure all unused rings
* are totally idle.
*/
init_unused_rings(gt);
ret = i915_ppgtt_init_hw(gt);
if (ret) {
DRM_ERROR("Enabling PPGTT failed (%d)\n", ret);
goto out;
}
ret = intel_wopcm_init_hw(&i915->wopcm, gt);
if (ret) {
DRM_ERROR("Enabling WOPCM failed (%d)\n", ret);
goto out;
}
/* We can't enable contexts until all firmware is loaded */
ret = intel_uc_init_hw(i915);
if (ret) {
DRM_ERROR("Enabling uc failed (%d)\n", ret);
goto out;
}
intel_mocs_init_l3cc_table(gt);
intel_engines_set_scheduler_caps(i915);
out:
intel_uncore_forcewake_put(uncore, FORCEWAKE_ALL);
return ret;
}
static int __intel_engines_record_defaults(struct drm_i915_private *i915)
{
struct intel_engine_cs *engine;
struct i915_gem_context *ctx;
struct i915_gem_engines *e;
enum intel_engine_id id;
int err = 0;
/*
* As we reset the gpu during very early sanitisation, the current
* register state on the GPU should reflect its defaults values.
* We load a context onto the hw (with restore-inhibit), then switch
* over to a second context to save that default register state. We
* can then prime every new context with that state so they all start
* from the same default HW values.
*/
ctx = i915_gem_context_create_kernel(i915, 0);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
e = i915_gem_context_lock_engines(ctx);
for_each_engine(engine, i915, id) {
struct intel_context *ce = e->engines[id];
struct i915_request *rq;
rq = intel_context_create_request(ce);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto err_active;
}
err = 0;
if (rq->engine->init_context)
err = rq->engine->init_context(rq);
i915_request_add(rq);
if (err)
goto err_active;
}
/* Flush the default context image to memory, and enable powersaving. */
if (!i915_gem_load_power_context(i915)) {
err = -EIO;
goto err_active;
}
for_each_engine(engine, i915, id) {
struct intel_context *ce = e->engines[id];
struct i915_vma *state = ce->state;
void *vaddr;
if (!state)
continue;
GEM_BUG_ON(intel_context_is_pinned(ce));
/*
* As we will hold a reference to the logical state, it will
* not be torn down with the context, and importantly the
* object will hold onto its vma (making it possible for a
* stray GTT write to corrupt our defaults). Unmap the vma
* from the GTT to prevent such accidents and reclaim the
* space.
*/
err = i915_vma_unbind(state);
if (err)
goto err_active;
i915_gem_object_lock(state->obj);
err = i915_gem_object_set_to_cpu_domain(state->obj, false);
i915_gem_object_unlock(state->obj);
if (err)
goto err_active;
engine->default_state = i915_gem_object_get(state->obj);
i915_gem_object_set_cache_coherency(engine->default_state,
I915_CACHE_LLC);
/* Check we can acquire the image of the context state */
vaddr = i915_gem_object_pin_map(engine->default_state,
I915_MAP_FORCE_WB);
if (IS_ERR(vaddr)) {
err = PTR_ERR(vaddr);
goto err_active;
}
i915_gem_object_unpin_map(engine->default_state);
}
if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) {
unsigned int found = intel_engines_has_context_isolation(i915);
/*
* Make sure that classes with multiple engine instances all
* share the same basic configuration.
*/
for_each_engine(engine, i915, id) {
unsigned int bit = BIT(engine->uabi_class);
unsigned int expected = engine->default_state ? bit : 0;
if ((found & bit) != expected) {
DRM_ERROR("mismatching default context state for class %d on engine %s\n",
engine->uabi_class, engine->name);
}
}
}
out_ctx:
i915_gem_context_unlock_engines(ctx);
i915_gem_context_set_closed(ctx);
i915_gem_context_put(ctx);
return err;
err_active:
/*
* If we have to abandon now, we expect the engines to be idle
* and ready to be torn-down. The quickest way we can accomplish
* this is by declaring ourselves wedged.
*/
i915_gem_set_wedged(i915);
goto out_ctx;
}
static int
i915_gem_init_scratch(struct drm_i915_private *i915, unsigned int size)
{
return intel_gt_init_scratch(&i915->gt, size);
}
static void i915_gem_fini_scratch(struct drm_i915_private *i915)
{
intel_gt_fini_scratch(&i915->gt);
}
static int intel_engines_verify_workarounds(struct drm_i915_private *i915)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
int err = 0;
if (!IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM))
return 0;
for_each_engine(engine, i915, id) {
if (intel_engine_verify_workarounds(engine, "load"))
err = -EIO;
}
return err;
}
int i915_gem_init(struct drm_i915_private *dev_priv)
{
int ret;
/* We need to fallback to 4K pages if host doesn't support huge gtt. */
if (intel_vgpu_active(dev_priv) && !intel_vgpu_has_huge_gtt(dev_priv))
mkwrite_device_info(dev_priv)->page_sizes =
I915_GTT_PAGE_SIZE_4K;
dev_priv->mm.unordered_timeline = dma_fence_context_alloc(1);
intel_timelines_init(dev_priv);
ret = i915_gem_init_userptr(dev_priv);
if (ret)
return ret;
ret = intel_uc_init_misc(dev_priv);
if (ret)
return ret;
ret = intel_wopcm_init(&dev_priv->wopcm);
if (ret)
goto err_uc_misc;
/* This is just a security blanket to placate dragons.
* On some systems, we very sporadically observe that the first TLBs
* used by the CS may be stale, despite us poking the TLB reset. If
* we hold the forcewake during initialisation these problems
* just magically go away.
*/
mutex_lock(&dev_priv->drm.struct_mutex);
intel_uncore_forcewake_get(&dev_priv->uncore, FORCEWAKE_ALL);
ret = i915_init_ggtt(dev_priv);
if (ret) {
GEM_BUG_ON(ret == -EIO);
goto err_unlock;
}
ret = i915_gem_init_scratch(dev_priv,
IS_GEN(dev_priv, 2) ? SZ_256K : PAGE_SIZE);
if (ret) {
GEM_BUG_ON(ret == -EIO);
goto err_ggtt;
}
ret = intel_engines_setup(dev_priv);
if (ret) {
GEM_BUG_ON(ret == -EIO);
goto err_unlock;
}
ret = i915_gem_contexts_init(dev_priv);
if (ret) {
GEM_BUG_ON(ret == -EIO);
goto err_scratch;
}
ret = intel_engines_init(dev_priv);
if (ret) {
GEM_BUG_ON(ret == -EIO);
goto err_context;
}
intel_init_gt_powersave(dev_priv);
ret = intel_uc_init(dev_priv);
if (ret)
goto err_pm;
ret = i915_gem_init_hw(dev_priv);
if (ret)
goto err_uc_init;
/* Only when the HW is re-initialised, can we replay the requests */
ret = intel_gt_resume(&dev_priv->gt);
if (ret)
goto err_init_hw;
/*
* Despite its name intel_init_clock_gating applies both display
* clock gating workarounds; GT mmio workarounds and the occasional
* GT power context workaround. Worse, sometimes it includes a context
* register workaround which we need to apply before we record the
* default HW state for all contexts.
*
* FIXME: break up the workarounds and apply them at the right time!
*/
intel_init_clock_gating(dev_priv);
ret = intel_engines_verify_workarounds(dev_priv);
if (ret)
goto err_gt;
ret = __intel_engines_record_defaults(dev_priv);
if (ret)
goto err_gt;
if (i915_inject_probe_failure()) {
ret = -ENODEV;
goto err_gt;
}
if (i915_inject_probe_failure()) {
ret = -EIO;
goto err_gt;
}
intel_uncore_forcewake_put(&dev_priv->uncore, FORCEWAKE_ALL);
mutex_unlock(&dev_priv->drm.struct_mutex);
return 0;
/*
* Unwinding is complicated by that we want to handle -EIO to mean
* disable GPU submission but keep KMS alive. We want to mark the
* HW as irrevisibly wedged, but keep enough state around that the
* driver doesn't explode during runtime.
*/
err_gt:
mutex_unlock(&dev_priv->drm.struct_mutex);
i915_gem_set_wedged(dev_priv);
i915_gem_suspend(dev_priv);
i915_gem_suspend_late(dev_priv);
i915_gem_drain_workqueue(dev_priv);
mutex_lock(&dev_priv->drm.struct_mutex);
err_init_hw:
intel_uc_fini_hw(dev_priv);
err_uc_init:
intel_uc_fini(dev_priv);
err_pm:
if (ret != -EIO) {
intel_cleanup_gt_powersave(dev_priv);
intel_engines_cleanup(dev_priv);
}
err_context:
if (ret != -EIO)
i915_gem_contexts_fini(dev_priv);
err_scratch:
i915_gem_fini_scratch(dev_priv);
err_ggtt:
err_unlock:
intel_uncore_forcewake_put(&dev_priv->uncore, FORCEWAKE_ALL);
mutex_unlock(&dev_priv->drm.struct_mutex);
err_uc_misc:
intel_uc_fini_misc(dev_priv);
if (ret != -EIO) {
i915_gem_cleanup_userptr(dev_priv);
intel_timelines_fini(dev_priv);
}
if (ret == -EIO) {
mutex_lock(&dev_priv->drm.struct_mutex);
/*
* Allow engine initialisation to fail by marking the GPU as
* wedged. But we only want to do this where the GPU is angry,
* for all other failure, such as an allocation failure, bail.
*/
if (!i915_reset_failed(dev_priv)) {
i915_probe_error(dev_priv,
"Failed to initialize GPU, declaring it wedged!\n");
i915_gem_set_wedged(dev_priv);
}
/* Minimal basic recovery for KMS */
ret = i915_ggtt_enable_hw(dev_priv);
i915_gem_restore_gtt_mappings(dev_priv);
i915_gem_restore_fences(dev_priv);
intel_init_clock_gating(dev_priv);
mutex_unlock(&dev_priv->drm.struct_mutex);
}
i915_gem_drain_freed_objects(dev_priv);
return ret;
}
void i915_gem_driver_remove(struct drm_i915_private *dev_priv)
{
GEM_BUG_ON(dev_priv->gt.awake);
intel_wakeref_auto_fini(&dev_priv->ggtt.userfault_wakeref);
i915_gem_suspend_late(dev_priv);
intel_disable_gt_powersave(dev_priv);
/* Flush any outstanding unpin_work. */
i915_gem_drain_workqueue(dev_priv);
mutex_lock(&dev_priv->drm.struct_mutex);
intel_uc_fini_hw(dev_priv);
intel_uc_fini(dev_priv);
mutex_unlock(&dev_priv->drm.struct_mutex);
i915_gem_drain_freed_objects(dev_priv);
}
void i915_gem_driver_release(struct drm_i915_private *dev_priv)
{
mutex_lock(&dev_priv->drm.struct_mutex);
intel_engines_cleanup(dev_priv);
i915_gem_contexts_fini(dev_priv);
i915_gem_fini_scratch(dev_priv);
mutex_unlock(&dev_priv->drm.struct_mutex);
intel_wa_list_free(&dev_priv->gt_wa_list);
intel_cleanup_gt_powersave(dev_priv);
intel_uc_fini_misc(dev_priv);
i915_gem_cleanup_userptr(dev_priv);
intel_timelines_fini(dev_priv);
i915_gem_drain_freed_objects(dev_priv);
WARN_ON(!list_empty(&dev_priv->contexts.list));
}
void i915_gem_init_mmio(struct drm_i915_private *i915)
{
i915_gem_sanitize(i915);
}
static void i915_gem_init__mm(struct drm_i915_private *i915)
{
spin_lock_init(&i915->mm.obj_lock);
spin_lock_init(&i915->mm.free_lock);
init_llist_head(&i915->mm.free_list);
INIT_LIST_HEAD(&i915->mm.purge_list);
INIT_LIST_HEAD(&i915->mm.shrink_list);
i915_gem_init__objects(i915);
}
int i915_gem_init_early(struct drm_i915_private *dev_priv)
{
int err;
i915_gem_init__mm(dev_priv);
i915_gem_init__pm(dev_priv);
init_waitqueue_head(&dev_priv->gpu_error.wait_queue);
init_waitqueue_head(&dev_priv->gpu_error.reset_queue);
mutex_init(&dev_priv->gpu_error.wedge_mutex);
init_srcu_struct(&dev_priv->gpu_error.reset_backoff_srcu);
atomic_set(&dev_priv->mm.bsd_engine_dispatch_index, 0);
spin_lock_init(&dev_priv->fb_tracking.lock);
err = i915_gemfs_init(dev_priv);
if (err)
DRM_NOTE("Unable to create a private tmpfs mount, hugepage support will be disabled(%d).\n", err);
return 0;
}
void i915_gem_cleanup_early(struct drm_i915_private *dev_priv)
{
i915_gem_drain_freed_objects(dev_priv);
GEM_BUG_ON(!llist_empty(&dev_priv->mm.free_list));
GEM_BUG_ON(atomic_read(&dev_priv->mm.free_count));
WARN_ON(dev_priv->mm.shrink_count);
cleanup_srcu_struct(&dev_priv->gpu_error.reset_backoff_srcu);
i915_gemfs_fini(dev_priv);
}
int i915_gem_freeze(struct drm_i915_private *dev_priv)
{
/* Discard all purgeable objects, let userspace recover those as
* required after resuming.
*/
i915_gem_shrink_all(dev_priv);
return 0;
}
int i915_gem_freeze_late(struct drm_i915_private *i915)
{
struct drm_i915_gem_object *obj;
intel_wakeref_t wakeref;
/*
* Called just before we write the hibernation image.
*
* We need to update the domain tracking to reflect that the CPU
* will be accessing all the pages to create and restore from the
* hibernation, and so upon restoration those pages will be in the
* CPU domain.
*
* To make sure the hibernation image contains the latest state,
* we update that state just before writing out the image.
*
* To try and reduce the hibernation image, we manually shrink
* the objects as well, see i915_gem_freeze()
*/
wakeref = intel_runtime_pm_get(&i915->runtime_pm);
i915_gem_shrink(i915, -1UL, NULL, ~0);
i915_gem_drain_freed_objects(i915);
list_for_each_entry(obj, &i915->mm.shrink_list, mm.link) {
i915_gem_object_lock(obj);
WARN_ON(i915_gem_object_set_to_cpu_domain(obj, true));
i915_gem_object_unlock(obj);
}
intel_runtime_pm_put(&i915->runtime_pm, wakeref);
return 0;
}
void i915_gem_release(struct drm_device *dev, struct drm_file *file)
{
struct drm_i915_file_private *file_priv = file->driver_priv;
struct i915_request *request;
/* Clean up our request list when the client is going away, so that
* later retire_requests won't dereference our soon-to-be-gone
* file_priv.
*/
spin_lock(&file_priv->mm.lock);
list_for_each_entry(request, &file_priv->mm.request_list, client_link)
request->file_priv = NULL;
spin_unlock(&file_priv->mm.lock);
}
int i915_gem_open(struct drm_i915_private *i915, struct drm_file *file)
{
struct drm_i915_file_private *file_priv;
int ret;
DRM_DEBUG("\n");
file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
if (!file_priv)
return -ENOMEM;
file->driver_priv = file_priv;
file_priv->dev_priv = i915;
file_priv->file = file;
spin_lock_init(&file_priv->mm.lock);
INIT_LIST_HEAD(&file_priv->mm.request_list);
file_priv->bsd_engine = -1;
file_priv->hang_timestamp = jiffies;
ret = i915_gem_context_open(i915, file);
if (ret)
kfree(file_priv);
return ret;
}
/**
* i915_gem_track_fb - update frontbuffer tracking
* @old: current GEM buffer for the frontbuffer slots
* @new: new GEM buffer for the frontbuffer slots
* @frontbuffer_bits: bitmask of frontbuffer slots
*
* This updates the frontbuffer tracking bits @frontbuffer_bits by clearing them
* from @old and setting them in @new. Both @old and @new can be NULL.
*/
void i915_gem_track_fb(struct drm_i915_gem_object *old,
struct drm_i915_gem_object *new,
unsigned frontbuffer_bits)
{
/* Control of individual bits within the mask are guarded by
* the owning plane->mutex, i.e. we can never see concurrent
* manipulation of individual bits. But since the bitfield as a whole
* is updated using RMW, we need to use atomics in order to update
* the bits.
*/
BUILD_BUG_ON(INTEL_FRONTBUFFER_BITS_PER_PIPE * I915_MAX_PIPES >
BITS_PER_TYPE(atomic_t));
if (old) {
WARN_ON(!(atomic_read(&old->frontbuffer_bits) & frontbuffer_bits));
atomic_andnot(frontbuffer_bits, &old->frontbuffer_bits);
}
if (new) {
WARN_ON(atomic_read(&new->frontbuffer_bits) & frontbuffer_bits);
atomic_or(frontbuffer_bits, &new->frontbuffer_bits);
}
}
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftests/mock_gem_device.c"
#include "selftests/i915_gem.c"
#endif
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