Contributors: 19
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Chris Wilson |
873 |
80.31% |
52 |
64.20% |
| Maarten Lankhorst |
64 |
5.89% |
3 |
3.70% |
| Dave Airlie |
40 |
3.68% |
3 |
3.70% |
| Eric Anholt |
23 |
2.12% |
2 |
2.47% |
| Matthew Auld |
17 |
1.56% |
4 |
4.94% |
| Daniel Vetter |
17 |
1.56% |
3 |
3.70% |
| Michał Winiarski |
16 |
1.47% |
1 |
1.23% |
| Zhao Liu |
8 |
0.74% |
1 |
1.23% |
| Jani Nikula |
6 |
0.55% |
2 |
2.47% |
| Tvrtko A. Ursulin |
5 |
0.46% |
1 |
1.23% |
| Gabriel Krisman Bertazi |
3 |
0.28% |
1 |
1.23% |
| Brad Volkin |
3 |
0.28% |
1 |
1.23% |
| Hugh Dickins |
2 |
0.18% |
1 |
1.23% |
| Kenneth Graunke |
2 |
0.18% |
1 |
1.23% |
| Thomas Hellstrom |
2 |
0.18% |
1 |
1.23% |
| Paulo Zanoni |
2 |
0.18% |
1 |
1.23% |
| Kirill A. Shutemov |
2 |
0.18% |
1 |
1.23% |
| Ankitprasad Sharma |
1 |
0.09% |
1 |
1.23% |
| Al Viro |
1 |
0.09% |
1 |
1.23% |
| Total |
1087 |
|
81 |
|
/*
* SPDX-License-Identifier: MIT
*
* Copyright © 2014-2016 Intel Corporation
*/
#include <linux/highmem.h>
#include <linux/shmem_fs.h>
#include <linux/swap.h>
#include <drm/drm_cache.h>
#include "gt/intel_gt.h"
#include "i915_drv.h"
#include "i915_gem_object.h"
#include "i915_gem_object_frontbuffer.h"
#include "i915_gem_region.h"
#include "i915_gem_tiling.h"
#include "i915_scatterlist.h"
static int i915_gem_object_get_pages_phys(struct drm_i915_gem_object *obj)
{
struct address_space *mapping = obj->base.filp->f_mapping;
struct drm_i915_private *i915 = to_i915(obj->base.dev);
struct scatterlist *sg;
struct sg_table *st;
dma_addr_t dma;
void *vaddr;
void *dst;
int i;
/* Contiguous chunk, with a single scatterlist element */
if (overflows_type(obj->base.size, sg->length))
return -E2BIG;
if (GEM_WARN_ON(i915_gem_object_needs_bit17_swizzle(obj)))
return -EINVAL;
/*
* Always aligning to the object size, allows a single allocation
* to handle all possible callers, and given typical object sizes,
* the alignment of the buddy allocation will naturally match.
*/
vaddr = dma_alloc_coherent(obj->base.dev->dev,
roundup_pow_of_two(obj->base.size),
&dma, GFP_KERNEL);
if (!vaddr)
return -ENOMEM;
st = kmalloc(sizeof(*st), GFP_KERNEL);
if (!st)
goto err_pci;
if (sg_alloc_table(st, 1, GFP_KERNEL))
goto err_st;
sg = st->sgl;
sg->offset = 0;
sg->length = obj->base.size;
sg_assign_page(sg, (struct page *)vaddr);
sg_dma_address(sg) = dma;
sg_dma_len(sg) = obj->base.size;
dst = vaddr;
for (i = 0; i < obj->base.size / PAGE_SIZE; i++) {
struct page *page;
page = shmem_read_mapping_page(mapping, i);
if (IS_ERR(page))
goto err_st;
memcpy_from_page(dst, page, 0, PAGE_SIZE);
drm_clflush_virt_range(dst, PAGE_SIZE);
put_page(page);
dst += PAGE_SIZE;
}
intel_gt_chipset_flush(to_gt(i915));
/* We're no longer struct page backed */
obj->mem_flags &= ~I915_BO_FLAG_STRUCT_PAGE;
__i915_gem_object_set_pages(obj, st);
return 0;
err_st:
kfree(st);
err_pci:
dma_free_coherent(obj->base.dev->dev,
roundup_pow_of_two(obj->base.size),
vaddr, dma);
return -ENOMEM;
}
void
i915_gem_object_put_pages_phys(struct drm_i915_gem_object *obj,
struct sg_table *pages)
{
dma_addr_t dma = sg_dma_address(pages->sgl);
void *vaddr = sg_page(pages->sgl);
__i915_gem_object_release_shmem(obj, pages, false);
if (obj->mm.dirty) {
struct address_space *mapping = obj->base.filp->f_mapping;
void *src = vaddr;
int i;
for (i = 0; i < obj->base.size / PAGE_SIZE; i++) {
struct page *page;
page = shmem_read_mapping_page(mapping, i);
if (IS_ERR(page))
continue;
drm_clflush_virt_range(src, PAGE_SIZE);
memcpy_to_page(page, 0, src, PAGE_SIZE);
set_page_dirty(page);
if (obj->mm.madv == I915_MADV_WILLNEED)
mark_page_accessed(page);
put_page(page);
src += PAGE_SIZE;
}
obj->mm.dirty = false;
}
sg_free_table(pages);
kfree(pages);
dma_free_coherent(obj->base.dev->dev,
roundup_pow_of_two(obj->base.size),
vaddr, dma);
}
int i915_gem_object_pwrite_phys(struct drm_i915_gem_object *obj,
const struct drm_i915_gem_pwrite *args)
{
void *vaddr = sg_page(obj->mm.pages->sgl) + args->offset;
char __user *user_data = u64_to_user_ptr(args->data_ptr);
struct drm_i915_private *i915 = to_i915(obj->base.dev);
int err;
err = i915_gem_object_wait(obj,
I915_WAIT_INTERRUPTIBLE |
I915_WAIT_ALL,
MAX_SCHEDULE_TIMEOUT);
if (err)
return err;
/*
* We manually control the domain here and pretend that it
* remains coherent i.e. in the GTT domain, like shmem_pwrite.
*/
i915_gem_object_invalidate_frontbuffer(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_gt(i915));
i915_gem_object_flush_frontbuffer(obj, ORIGIN_CPU);
return 0;
}
int i915_gem_object_pread_phys(struct drm_i915_gem_object *obj,
const struct drm_i915_gem_pread *args)
{
void *vaddr = sg_page(obj->mm.pages->sgl) + args->offset;
char __user *user_data = u64_to_user_ptr(args->data_ptr);
int err;
err = i915_gem_object_wait(obj,
I915_WAIT_INTERRUPTIBLE,
MAX_SCHEDULE_TIMEOUT);
if (err)
return err;
drm_clflush_virt_range(vaddr, args->size);
if (copy_to_user(user_data, vaddr, args->size))
return -EFAULT;
return 0;
}
static int i915_gem_object_shmem_to_phys(struct drm_i915_gem_object *obj)
{
struct sg_table *pages;
int err;
pages = __i915_gem_object_unset_pages(obj);
err = i915_gem_object_get_pages_phys(obj);
if (err)
goto err_xfer;
/* Perma-pin (until release) the physical set of pages */
__i915_gem_object_pin_pages(obj);
if (!IS_ERR_OR_NULL(pages))
i915_gem_object_put_pages_shmem(obj, pages);
i915_gem_object_release_memory_region(obj);
return 0;
err_xfer:
if (!IS_ERR_OR_NULL(pages))
__i915_gem_object_set_pages(obj, pages);
return err;
}
int i915_gem_object_attach_phys(struct drm_i915_gem_object *obj, int align)
{
int err;
assert_object_held(obj);
if (align > obj->base.size)
return -EINVAL;
if (!i915_gem_object_is_shmem(obj))
return -EINVAL;
if (!i915_gem_object_has_struct_page(obj))
return 0;
err = i915_gem_object_unbind(obj, I915_GEM_OBJECT_UNBIND_ACTIVE);
if (err)
return err;
if (obj->mm.madv != I915_MADV_WILLNEED)
return -EFAULT;
if (i915_gem_object_has_tiling_quirk(obj))
return -EFAULT;
if (obj->mm.mapping || i915_gem_object_has_pinned_pages(obj))
return -EBUSY;
if (unlikely(obj->mm.madv != I915_MADV_WILLNEED)) {
drm_dbg(obj->base.dev,
"Attempting to obtain a purgeable object\n");
return -EFAULT;
}
return i915_gem_object_shmem_to_phys(obj);
}
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftests/i915_gem_phys.c"
#endif