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Revert "Merge branch 'vmwgfx-next' of git://people.freedesktop.org/~thomash/linux into drm-next" 

This reverts commit 031e610a6a, reversing
changes made to 52d2d44eee.

The mm changes in there we premature and not fully ack or reviewed by core mm folks,
I dropped the ball by merging them via this tree, so lets take em all back out.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2019-07-16 04:07:13 +10:00
parent 7e4b4dfc98
commit 3729fe2bc2
30 changed files with 483 additions and 2136 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
MAINTAINERS
View File

@ -5191,7 +5191,6 @@ T: git git://people.freedesktop.org/~thomash/linux
S: Supported
F: drivers/gpu/drm/vmwgfx/
F: include/uapi/drm/vmwgfx_drm.h
F: mm/as_dirty_helpers.c
DRM DRIVERS
M: David Airlie <airlied@linux.ie>

1
drivers/gpu/drm/ttm/ttm_bo.c
View File

@ -1739,7 +1739,6 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
mutex_lock(&ttm_global_mutex);
list_add_tail(&bdev->device_list, &glob->device_list);
mutex_unlock(&ttm_global_mutex);
bdev->vm_ops = &ttm_bo_vm_ops;
return 0;
out_no_sys:

169
drivers/gpu/drm/ttm/ttm_bo_vm.c
View File

@ -42,6 +42,8 @@
#include <linux/uaccess.h>
#include <linux/mem_encrypt.h>
#define TTM_BO_VM_NUM_PREFAULT 16
static vm_fault_t ttm_bo_vm_fault_idle(struct ttm_buffer_object *bo,
struct vm_fault *vmf)
{
@ -104,30 +106,25 @@ static unsigned long ttm_bo_io_mem_pfn(struct ttm_buffer_object *bo,
+ page_offset;
}
/**
* ttm_bo_vm_reserve - Reserve a buffer object in a retryable vm callback
* @bo: The buffer object
* @vmf: The fault structure handed to the callback
*
* vm callbacks like fault() and *_mkwrite() allow for the mm_sem to be dropped
* during long waits, and after the wait the callback will be restarted. This
* is to allow other threads using the same virtual memory space concurrent
* access to map(), unmap() completely unrelated buffer objects. TTM buffer
* object reservations sometimes wait for GPU and should therefore be
* considered long waits. This function reserves the buffer object interruptibly
* taking this into account. Starvation is avoided by the vm system not
* allowing too many repeated restarts.
* This function is intended to be used in customized fault() and _mkwrite()
* handlers.
*
* Return:
* 0 on success and the bo was reserved.
* VM_FAULT_RETRY if blocking wait.
* VM_FAULT_NOPAGE if blocking wait and retrying was not allowed.
*/
vm_fault_t ttm_bo_vm_reserve(struct ttm_buffer_object *bo,
struct vm_fault *vmf)
static vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
vma->vm_private_data;
struct ttm_bo_device *bdev = bo->bdev;
unsigned long page_offset;
unsigned long page_last;
unsigned long pfn;
struct ttm_tt *ttm = NULL;
struct page *page;
int err;
int i;
vm_fault_t ret = VM_FAULT_NOPAGE;
unsigned long address = vmf->address;
struct ttm_mem_type_manager *man =
&bdev->man[bo->mem.mem_type];
struct vm_area_struct cvma;
/*
* Work around locking order reversal in fault / nopfn
* between mmap_sem and bo_reserve: Perform a trylock operation
@ -154,55 +151,14 @@ vm_fault_t ttm_bo_vm_reserve(struct ttm_buffer_object *bo,
return VM_FAULT_NOPAGE;
}
return 0;
}
EXPORT_SYMBOL(ttm_bo_vm_reserve);
/**
* ttm_bo_vm_fault_reserved - TTM fault helper
* @vmf: The struct vm_fault given as argument to the fault callback
* @prot: The page protection to be used for this memory area.
* @num_prefault: Maximum number of prefault pages. The caller may want to
* specify this based on madvice settings and the size of the GPU object
* backed by the memory.
*
* This function inserts one or more page table entries pointing to the
* memory backing the buffer object, and then returns a return code
* instructing the caller to retry the page access.
*
* Return:
* VM_FAULT_NOPAGE on success or pending signal
* VM_FAULT_SIGBUS on unspecified error
* VM_FAULT_OOM on out-of-memory
* VM_FAULT_RETRY if retryable wait
*/
vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
pgprot_t prot,
pgoff_t num_prefault)
{
struct vm_area_struct *vma = vmf->vma;
struct vm_area_struct cvma = *vma;
struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
vma->vm_private_data;
struct ttm_bo_device *bdev = bo->bdev;
unsigned long page_offset;
unsigned long page_last;
unsigned long pfn;
struct ttm_tt *ttm = NULL;
struct page *page;
int err;
pgoff_t i;
vm_fault_t ret = VM_FAULT_NOPAGE;
unsigned long address = vmf->address;
struct ttm_mem_type_manager *man =
&bdev->man[bo->mem.mem_type];
/*
* Refuse to fault imported pages. This should be handled
* (if at all) by redirecting mmap to the exporter.
*/
if (bo->ttm && (bo->ttm->page_flags & TTM_PAGE_FLAG_SG))
return VM_FAULT_SIGBUS;
if (bo->ttm && (bo->ttm->page_flags & TTM_PAGE_FLAG_SG)) {
ret = VM_FAULT_SIGBUS;
goto out_unlock;
}
if (bdev->driver->fault_reserve_notify) {
struct dma_fence *moving = dma_fence_get(bo->moving);
@ -213,9 +169,11 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
break;
case -EBUSY:
case -ERESTARTSYS:
return VM_FAULT_NOPAGE;
ret = VM_FAULT_NOPAGE;
goto out_unlock;
default:
return VM_FAULT_SIGBUS;
ret = VM_FAULT_SIGBUS;
goto out_unlock;
}
if (bo->moving != moving) {
@ -231,12 +189,21 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
* move.
*/
ret = ttm_bo_vm_fault_idle(bo, vmf);
if (unlikely(ret != 0))
return ret;
if (unlikely(ret != 0)) {
if (ret == VM_FAULT_RETRY &&
!(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) {
/* The BO has already been unreserved. */
return ret;
}
goto out_unlock;
}
err = ttm_mem_io_lock(man, true);
if (unlikely(err != 0))
return VM_FAULT_NOPAGE;
if (unlikely(err != 0)) {
ret = VM_FAULT_NOPAGE;
goto out_unlock;
}
err = ttm_mem_io_reserve_vm(bo);
if (unlikely(err != 0)) {
ret = VM_FAULT_SIGBUS;
@ -253,8 +220,18 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
goto out_io_unlock;
}
cvma.vm_page_prot = ttm_io_prot(bo->mem.placement, prot);
if (!bo->mem.bus.is_iomem) {
/*
* Make a local vma copy to modify the page_prot member
* and vm_flags if necessary. The vma parameter is protected
* by mmap_sem in write mode.
*/
cvma = *vma;
cvma.vm_page_prot = vm_get_page_prot(cvma.vm_flags);
if (bo->mem.bus.is_iomem) {
cvma.vm_page_prot = ttm_io_prot(bo->mem.placement,
cvma.vm_page_prot);
} else {
struct ttm_operation_ctx ctx = {
.interruptible = false,
.no_wait_gpu = false,
@ -263,21 +240,24 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
};
ttm = bo->ttm;
if (ttm_tt_populate(bo->ttm, &ctx)) {
cvma.vm_page_prot = ttm_io_prot(bo->mem.placement,
cvma.vm_page_prot);
/* Allocate all page at once, most common usage */
if (ttm_tt_populate(ttm, &ctx)) {
ret = VM_FAULT_OOM;
goto out_io_unlock;
}
} else {
/* Iomem should not be marked encrypted */
cvma.vm_page_prot = pgprot_decrypted(cvma.vm_page_prot);
}
/*
* Speculatively prefault a number of pages. Only error on
* first page.
*/
for (i = 0; i < num_prefault; ++i) {
for (i = 0; i < TTM_BO_VM_NUM_PREFAULT; ++i) {
if (bo->mem.bus.is_iomem) {
/* Iomem should not be marked encrypted */
cvma.vm_page_prot = pgprot_decrypted(cvma.vm_page_prot);
pfn = ttm_bo_io_mem_pfn(bo, page_offset);
} else {
page = ttm->pages[page_offset];
@ -315,26 +295,7 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
ret = VM_FAULT_NOPAGE;
out_io_unlock:
ttm_mem_io_unlock(man);
return ret;
}
EXPORT_SYMBOL(ttm_bo_vm_fault_reserved);
static vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
pgprot_t prot;
struct ttm_buffer_object *bo = vma->vm_private_data;
vm_fault_t ret;
ret = ttm_bo_vm_reserve(bo, vmf);
if (ret)
return ret;
prot = vm_get_page_prot(vma->vm_flags);
ret = ttm_bo_vm_fault_reserved(vmf, prot, TTM_BO_VM_NUM_PREFAULT);
if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT))
return ret;
out_unlock:
reservation_object_unlock(bo->resv);
return ret;
}
@ -434,7 +395,7 @@ static int ttm_bo_vm_access(struct vm_area_struct *vma, unsigned long addr,
return ret;
}
const struct vm_operations_struct ttm_bo_vm_ops = {
static const struct vm_operations_struct ttm_bo_vm_ops = {
.fault = ttm_bo_vm_fault,
.open = ttm_bo_vm_open,
.close = ttm_bo_vm_close,
@ -487,7 +448,7 @@ int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
if (unlikely(ret != 0))
goto out_unref;
vma->vm_ops = bdev->vm_ops;
vma->vm_ops = &ttm_bo_vm_ops;
/*
* Note: We're transferring the bo reference to
@ -519,7 +480,7 @@ int ttm_fbdev_mmap(struct vm_area_struct *vma, struct ttm_buffer_object *bo)
ttm_bo_get(bo);
vma->vm_ops = bo->bdev->vm_ops;
vma->vm_ops = &ttm_bo_vm_ops;
vma->vm_private_data = bo;
vma->vm_flags |= VM_MIXEDMAP;
vma->vm_flags |= VM_IO | VM_DONTEXPAND;

1
drivers/gpu/drm/vmwgfx/Kconfig
View File

@ -8,7 +8,6 @@ config DRM_VMWGFX
select FB_CFB_IMAGEBLIT
select DRM_TTM
select FB
select AS_DIRTY_HELPERS
# Only needed for the transitional use of drm_crtc_init - can be removed
# again once vmwgfx sets up the primary plane itself.
select DRM_KMS_HELPER

2
drivers/gpu/drm/vmwgfx/Makefile
View File

@ -8,7 +8,7 @@ vmwgfx-y := vmwgfx_execbuf.o vmwgfx_gmr.o vmwgfx_kms.o vmwgfx_drv.o \
vmwgfx_cmdbuf_res.o vmwgfx_cmdbuf.o vmwgfx_stdu.o \
vmwgfx_cotable.o vmwgfx_so.o vmwgfx_binding.o vmwgfx_msg.o \
vmwgfx_simple_resource.o vmwgfx_va.o vmwgfx_blit.o \
vmwgfx_validation.o vmwgfx_page_dirty.o \
vmwgfx_validation.o \
ttm_object.o ttm_lock.o
obj-$(CONFIG_DRM_VMWGFX) := vmwgfx.o

233
drivers/gpu/drm/vmwgfx/device_include/svga3d_surfacedefs.h
View File

@ -1280,6 +1280,7 @@ svga3dsurface_get_pixel_offset(SVGA3dSurfaceFormat format,
return offset;
}
static inline u32
svga3dsurface_get_image_offset(SVGA3dSurfaceFormat format,
surf_size_struct baseLevelSize,
@ -1374,236 +1375,4 @@ svga3dsurface_is_screen_target_format(SVGA3dSurfaceFormat format)
return svga3dsurface_is_dx_screen_target_format(format);
}
/**
* struct svga3dsurface_mip - Mimpmap level information
* @bytes: Bytes required in the backing store of this mipmap level.
* @img_stride: Byte stride per image.
* @row_stride: Byte stride per block row.
* @size: The size of the mipmap.
*/
struct svga3dsurface_mip {
size_t bytes;
size_t img_stride;
size_t row_stride;
struct drm_vmw_size size;
};
/**
* struct svga3dsurface_cache - Cached surface information
* @desc: Pointer to the surface descriptor
* @mip: Array of mipmap level information. Valid size is @num_mip_levels.
* @mip_chain_bytes: Bytes required in the backing store for the whole chain
* of mip levels.
* @sheet_bytes: Bytes required in the backing store for a sheet
* representing a single sample.
* @num_mip_levels: Valid size of the @mip array. Number of mipmap levels in
* a chain.
* @num_layers: Number of slices in an array texture or number of faces in
* a cubemap texture.
*/
struct svga3dsurface_cache {
const struct svga3d_surface_desc *desc;
struct svga3dsurface_mip mip[DRM_VMW_MAX_MIP_LEVELS];
size_t mip_chain_bytes;
size_t sheet_bytes;
u32 num_mip_levels;
u32 num_layers;
};
/**
* struct svga3dsurface_loc - Surface location
* @sub_resource: Surface subresource. Defined as layer * num_mip_levels +
* mip_level.
* @x: X coordinate.
* @y: Y coordinate.
* @z: Z coordinate.
*/
struct svga3dsurface_loc {
u32 sub_resource;
u32 x, y, z;
};
/**
* svga3dsurface_subres - Compute the subresource from layer and mipmap.
* @cache: Surface layout data.
* @mip_level: The mipmap level.
* @layer: The surface layer (face or array slice).
*
* Return: The subresource.
*/
static inline u32 svga3dsurface_subres(const struct svga3dsurface_cache *cache,
u32 mip_level, u32 layer)
{
return cache->num_mip_levels * layer + mip_level;
}
/**
* svga3dsurface_setup_cache - Build a surface cache entry
* @size: The surface base level dimensions.
* @format: The surface format.
* @num_mip_levels: Number of mipmap levels.
* @num_layers: Number of layers.
* @cache: Pointer to a struct svga3dsurface_cach object to be filled in.
*
* Return: Zero on success, -EINVAL on invalid surface layout.
*/
static inline int svga3dsurface_setup_cache(const struct drm_vmw_size *size,
SVGA3dSurfaceFormat format,
u32 num_mip_levels,
u32 num_layers,
u32 num_samples,
struct svga3dsurface_cache *cache)
{
const struct svga3d_surface_desc *desc;
u32 i;
memset(cache, 0, sizeof(*cache));
cache->desc = desc = svga3dsurface_get_desc(format);
cache->num_mip_levels = num_mip_levels;
cache->num_layers = num_layers;
for (i = 0; i < cache->num_mip_levels; i++) {
struct svga3dsurface_mip *mip = &cache->mip[i];
mip->size = svga3dsurface_get_mip_size(*size, i);
mip->bytes = svga3dsurface_get_image_buffer_size
(desc, &mip->size, 0);
mip->row_stride =
__KERNEL_DIV_ROUND_UP(mip->size.width,
desc->block_size.width) *
desc->bytes_per_block * num_samples;
if (!mip->row_stride)
goto invalid_dim;
mip->img_stride =
__KERNEL_DIV_ROUND_UP(mip->size.height,
desc->block_size.height) *
mip->row_stride;
if (!mip->img_stride)
goto invalid_dim;
cache->mip_chain_bytes += mip->bytes;
}
cache->sheet_bytes = cache->mip_chain_bytes * num_layers;
if (!cache->sheet_bytes)
goto invalid_dim;
return 0;
invalid_dim:
VMW_DEBUG_USER("Invalid surface layout for dirty tracking.\n");
return -EINVAL;
}
/**
* svga3dsurface_get_loc - Get a surface location from an offset into the
* backing store
* @cache: Surface layout data.
* @loc: Pointer to a struct svga3dsurface_loc to be filled in.
* @offset: Offset into the surface backing store.
*/
static inline void
svga3dsurface_get_loc(const struct svga3dsurface_cache *cache,
struct svga3dsurface_loc *loc,
size_t offset)
{
const struct svga3dsurface_mip *mip = &cache->mip[0];
const struct svga3d_surface_desc *desc = cache->desc;
u32 layer;
int i;
if (offset >= cache->sheet_bytes)
offset %= cache->sheet_bytes;
layer = offset / cache->mip_chain_bytes;
offset -= layer * cache->mip_chain_bytes;
for (i = 0; i < cache->num_mip_levels; ++i, ++mip) {
if (mip->bytes > offset)
break;
offset -= mip->bytes;
}
loc->sub_resource = svga3dsurface_subres(cache, i, layer);
loc->z = offset / mip->img_stride;
offset -= loc->z * mip->img_stride;
loc->z *= desc->block_size.depth;
loc->y = offset / mip->row_stride;
offset -= loc->y * mip->row_stride;
loc->y *= desc->block_size.height;
loc->x = offset / desc->bytes_per_block;
loc->x *= desc->block_size.width;
}
/**
* svga3dsurface_inc_loc - Clamp increment a surface location with one block
* size
* in each dimension.
* @loc: Pointer to a struct svga3dsurface_loc to be incremented.
*
* When computing the size of a range as size = end - start, the range does not
* include the end element. However a location representing the last byte
* of a touched region in the backing store *is* included in the range.
* This function modifies such a location to match the end definition
* given as start + size which is the one used in a SVGA3dBox.
*/
static inline void
svga3dsurface_inc_loc(const struct svga3dsurface_cache *cache,
struct svga3dsurface_loc *loc)
{
const struct svga3d_surface_desc *desc = cache->desc;
u32 mip = loc->sub_resource % cache->num_mip_levels;
const struct drm_vmw_size *size = &cache->mip[mip].size;
loc->sub_resource++;
loc->x += desc->block_size.width;
if (loc->x > size->width)
loc->x = size->width;
loc->y += desc->block_size.height;
if (loc->y > size->height)
loc->y = size->height;
loc->z += desc->block_size.depth;
if (loc->z > size->depth)
loc->z = size->depth;
}
/**
* svga3dsurface_min_loc - The start location in a subresource
* @cache: Surface layout data.
* @sub_resource: The subresource.
* @loc: Pointer to a struct svga3dsurface_loc to be filled in.
*/
static inline void
svga3dsurface_min_loc(const struct svga3dsurface_cache *cache,
u32 sub_resource,
struct svga3dsurface_loc *loc)
{
loc->sub_resource = sub_resource;
loc->x = loc->y = loc->z = 0;
}
/**
* svga3dsurface_min_loc - The end location in a subresource
* @cache: Surface layout data.
* @sub_resource: The subresource.
* @loc: Pointer to a struct svga3dsurface_loc to be filled in.
*
* Following the end definition given in svga3dsurface_inc_loc(),
* Compute the end location of a surface subresource.
*/
static inline void
svga3dsurface_max_loc(const struct svga3dsurface_cache *cache,
u32 sub_resource,
struct svga3dsurface_loc *loc)
{
const struct drm_vmw_size *size;
u32 mip;
loc->sub_resource = sub_resource + 1;
mip = sub_resource % cache->num_mip_levels;
size = &cache->mip[mip].size;
loc->x = size->width;
loc->y = size->height;
loc->z = size->depth;
}
#endif /* _SVGA3D_SURFACEDEFS_H_ */

100
drivers/gpu/drm/vmwgfx/ttm_lock.c
View File

@ -29,6 +29,7 @@
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
#include <drm/ttm/ttm_module.h>
#include <linux/atomic.h>
#include <linux/errno.h>
#include <linux/wait.h>
@ -48,6 +49,8 @@ void ttm_lock_init(struct ttm_lock *lock)
init_waitqueue_head(&lock->queue);
lock->rw = 0;
lock->flags = 0;
lock->kill_takers = false;
lock->signal = SIGKILL;
}
void ttm_read_unlock(struct ttm_lock *lock)
@ -63,6 +66,11 @@ static bool __ttm_read_lock(struct ttm_lock *lock)
bool locked = false;
spin_lock(&lock->lock);
if (unlikely(lock->kill_takers)) {
send_sig(lock->signal, current, 0);
spin_unlock(&lock->lock);
return false;
}
if (lock->rw >= 0 && lock->flags == 0) {
++lock->rw;
locked = true;
@ -90,6 +98,11 @@ static bool __ttm_read_trylock(struct ttm_lock *lock, bool *locked)
*locked = false;
spin_lock(&lock->lock);
if (unlikely(lock->kill_takers)) {
send_sig(lock->signal, current, 0);
spin_unlock(&lock->lock);
return false;
}
if (lock->rw >= 0 && lock->flags == 0) {
++lock->rw;
block = false;
@ -134,6 +147,11 @@ static bool __ttm_write_lock(struct ttm_lock *lock)
bool locked = false;
spin_lock(&lock->lock);
if (unlikely(lock->kill_takers)) {
send_sig(lock->signal, current, 0);
spin_unlock(&lock->lock);
return false;
}
if (lock->rw == 0 && ((lock->flags & ~TTM_WRITE_LOCK_PENDING) == 0)) {
lock->rw = -1;
lock->flags &= ~TTM_WRITE_LOCK_PENDING;
@ -164,6 +182,88 @@ int ttm_write_lock(struct ttm_lock *lock, bool interruptible)
return ret;
}
static int __ttm_vt_unlock(struct ttm_lock *lock)
{
int ret = 0;
spin_lock(&lock->lock);
if (unlikely(!(lock->flags & TTM_VT_LOCK)))
ret = -EINVAL;
lock->flags &= ~TTM_VT_LOCK;
wake_up_all(&lock->queue);
spin_unlock(&lock->lock);
return ret;
}
static void ttm_vt_lock_remove(struct ttm_base_object **p_base)
{
struct ttm_base_object *base = *p_base;
struct ttm_lock *lock = container_of(base, struct ttm_lock, base);
int ret;
*p_base = NULL;
ret = __ttm_vt_unlock(lock);
BUG_ON(ret != 0);
}
static bool __ttm_vt_lock(struct ttm_lock *lock)
{
bool locked = false;
spin_lock(&lock->lock);
if (lock->rw == 0) {
lock->flags &= ~TTM_VT_LOCK_PENDING;
lock->flags |= TTM_VT_LOCK;
locked = true;
} else {
lock->flags |= TTM_VT_LOCK_PENDING;
}
spin_unlock(&lock->lock);
return locked;
}
int ttm_vt_lock(struct ttm_lock *lock,
bool interruptible,
struct ttm_object_file *tfile)
{
int ret = 0;
if (interruptible) {
ret = wait_event_interruptible(lock->queue,
__ttm_vt_lock(lock));
if (unlikely(ret != 0)) {
spin_lock(&lock->lock);
lock->flags &= ~TTM_VT_LOCK_PENDING;
wake_up_all(&lock->queue);
spin_unlock(&lock->lock);
return ret;
}
} else
wait_event(lock->queue, __ttm_vt_lock(lock));
/*
* Add a base-object, the destructor of which will
* make sure the lock is released if the client dies
* while holding it.
*/
ret = ttm_base_object_init(tfile, &lock->base, false,
ttm_lock_type, &ttm_vt_lock_remove, NULL);
if (ret)
(void)__ttm_vt_unlock(lock);
else
lock->vt_holder = tfile;
return ret;
}
int ttm_vt_unlock(struct ttm_lock *lock)
{
return ttm_ref_object_base_unref(lock->vt_holder,
lock->base.handle, TTM_REF_USAGE);
}
void ttm_suspend_unlock(struct ttm_lock *lock)
{
spin_lock(&lock->lock);

30
drivers/gpu/drm/vmwgfx/ttm_lock.h
View File

@ -63,6 +63,8 @@
* @lock: Spinlock protecting some lock members.
* @rw: Read-write lock counter. Protected by @lock.
* @flags: Lock state. Protected by @lock.
* @kill_takers: Boolean whether to kill takers of the lock.
* @signal: Signal to send when kill_takers is true.
*/
struct ttm_lock {
@ -71,6 +73,9 @@ struct ttm_lock {
spinlock_t lock;
int32_t rw;
uint32_t flags;
bool kill_takers;
int signal;
struct ttm_object_file *vt_holder;
};
@ -215,4 +220,29 @@ extern void ttm_write_unlock(struct ttm_lock *lock);
*/
extern int ttm_write_lock(struct ttm_lock *lock, bool interruptible);
/**
* ttm_lock_set_kill
*
* @lock: Pointer to a struct ttm_lock
* @val: Boolean whether to kill processes taking the lock.
* @signal: Signal to send to the process taking the lock.
*
* The kill-when-taking-lock functionality is used to kill processes that keep
* on using the TTM functionality when its resources has been taken down, for
* example when the X server exits. A typical sequence would look like this:
* - X server takes lock in write mode.
* - ttm_lock_set_kill() is called with @val set to true.
* - As part of X server exit, TTM resources are taken down.
* - X server releases the lock on file release.
* - Another dri client wants to render, takes the lock and is killed.
*
*/
static inline void ttm_lock_set_kill(struct ttm_lock *lock, bool val,
int signal)
{
lock->kill_takers = val;
if (val)
lock->signal = signal;
}
#endif

12
drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
View File

@ -463,8 +463,6 @@ void vmw_bo_bo_free(struct ttm_buffer_object *bo)
{
struct vmw_buffer_object *vmw_bo = vmw_buffer_object(bo);
WARN_ON(vmw_bo->dirty);
WARN_ON(!RB_EMPTY_ROOT(&vmw_bo->res_tree));
vmw_bo_unmap(vmw_bo);
kfree(vmw_bo);
}
@ -478,11 +476,8 @@ void vmw_bo_bo_free(struct ttm_buffer_object *bo)
static void vmw_user_bo_destroy(struct ttm_buffer_object *bo)
{
struct vmw_user_buffer_object *vmw_user_bo = vmw_user_buffer_object(bo);
struct vmw_buffer_object *vbo = &vmw_user_bo->vbo;
WARN_ON(vbo->dirty);
WARN_ON(!RB_EMPTY_ROOT(&vbo->res_tree));
vmw_bo_unmap(vbo);
vmw_bo_unmap(&vmw_user_bo->vbo);
ttm_prime_object_kfree(vmw_user_bo, prime);
}
@ -515,9 +510,8 @@ int vmw_bo_init(struct vmw_private *dev_priv,
acc_size = vmw_bo_acc_size(dev_priv, size, user);
memset(vmw_bo, 0, sizeof(*vmw_bo));
BUILD_BUG_ON(TTM_MAX_BO_PRIORITY <= 3);
vmw_bo->base.priority = 3;
vmw_bo->res_tree = RB_ROOT;
INIT_LIST_HEAD(&vmw_bo->res_list);
ret = ttm_bo_init(bdev, &vmw_bo->base, size,
ttm_bo_type_device, placement,

4
drivers/gpu/drm/vmwgfx/vmwgfx_context.c
View File

@ -88,8 +88,6 @@ static const struct vmw_res_func vmw_gb_context_func = {
.res_type = vmw_res_context,
.needs_backup = true,
.may_evict = true,
.prio = 3,
.dirty_prio = 3,
.type_name = "guest backed contexts",
.backup_placement = &vmw_mob_placement,
.create = vmw_gb_context_create,
@ -102,8 +100,6 @@ static const struct vmw_res_func vmw_dx_context_func = {
.res_type = vmw_res_dx_context,
.needs_backup = true,
.may_evict = true,
.prio = 3,
.dirty_prio = 3,
.type_name = "dx contexts",
.backup_placement = &vmw_mob_placement,
.create = vmw_dx_context_create,

13
drivers/gpu/drm/vmwgfx/vmwgfx_cotable.c
View File

@ -116,8 +116,6 @@ static const struct vmw_res_func vmw_cotable_func = {
.res_type = vmw_res_cotable,
.needs_backup = true,
.may_evict = true,
.prio = 3,
.dirty_prio = 3,
.type_name = "context guest backed object tables",
.backup_placement = &vmw_mob_placement,
.create = vmw_cotable_create,
@ -309,7 +307,7 @@ static int vmw_cotable_unbind(struct vmw_resource *res,
struct ttm_buffer_object *bo = val_buf->bo;
struct vmw_fence_obj *fence;
if (!vmw_resource_mob_attached(res))
if (list_empty(&res->mob_head))
return 0;
WARN_ON_ONCE(bo->mem.mem_type != VMW_PL_MOB);
@ -455,7 +453,6 @@ static int vmw_cotable_resize(struct vmw_resource *res, size_t new_size)
goto out_wait;
}
vmw_resource_mob_detach(res);
res->backup = buf;
res->backup_size = new_size;
vcotbl->size_read_back = cur_size_read_back;
@ -470,12 +467,12 @@ static int vmw_cotable_resize(struct vmw_resource *res, size_t new_size)
res->backup = old_buf;
res->backup_size = old_size;
vcotbl->size_read_back = old_size_read_back;
vmw_resource_mob_attach(res);
goto out_wait;
}
vmw_resource_mob_attach(res);
/* Let go of the old mob. */
list_del(&res->mob_head);
list_add_tail(&res->mob_head, &buf->res_list);
vmw_bo_unreference(&old_buf);
res->id = vcotbl->type;
@ -499,7 +496,7 @@ out_wait:
* is called before bind() in the validation sequence is instead used for two
* things.
* 1) Unscrub the cotable if it is scrubbed and still attached to a backup
* buffer.
* buffer, that is, if @res->mob_head is non-empty.
* 2) Resize the cotable if needed.
*/
static int vmw_cotable_create(struct vmw_resource *res)
@ -515,7 +512,7 @@ static int vmw_cotable_create(struct vmw_resource *res)
new_size *= 2;
if (likely(new_size <= res->backup_size)) {
if (vcotbl->scrubbed && vmw_resource_mob_attached(res)) {
if (vcotbl->scrubbed && !list_empty(&res->mob_head)) {
ret = vmw_cotable_unscrub(res);
if (ret)
return ret;

167
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
View File

@ -254,6 +254,7 @@ static int vmw_restrict_dma_mask;
static int vmw_assume_16bpp;
static int vmw_probe(struct pci_dev *, const struct pci_device_id *);
static void vmw_master_init(struct vmw_master *);
static int vmwgfx_pm_notifier(struct notifier_block *nb, unsigned long val,
void *ptr);
@ -761,6 +762,10 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
DRM_INFO("MMIO at 0x%08x size is %u kiB\n",
dev_priv->mmio_start, dev_priv->mmio_size / 1024);
vmw_master_init(&dev_priv->fbdev_master);
ttm_lock_set_kill(&dev_priv->fbdev_master.lock, false, SIGTERM);
dev_priv->active_master = &dev_priv->fbdev_master;
dev_priv->mmio_virt = memremap(dev_priv->mmio_start,
dev_priv->mmio_size, MEMREMAP_WB);
@ -828,11 +833,6 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
DRM_ERROR("Failed initializing TTM buffer object driver.\n");
goto out_no_bdev;
}
dev_priv->vm_ops = *dev_priv->bdev.vm_ops;
dev_priv->vm_ops.fault = vmw_bo_vm_fault;
dev_priv->vm_ops.pfn_mkwrite = vmw_bo_vm_mkwrite;
dev_priv->vm_ops.page_mkwrite = vmw_bo_vm_mkwrite;
dev_priv->bdev.vm_ops = &dev_priv->vm_ops;
/*
* Enable VRAM, but initially don't use it until SVGA is enabled and
@ -1007,7 +1007,18 @@ static void vmw_driver_unload(struct drm_device *dev)
static void vmw_postclose(struct drm_device *dev,
struct drm_file *file_priv)
{
struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
struct vmw_fpriv *vmw_fp;
vmw_fp = vmw_fpriv(file_priv);
if (vmw_fp->locked_master) {
struct vmw_master *vmaster =
vmw_master(vmw_fp->locked_master);
ttm_lock_set_kill(&vmaster->lock, true, SIGTERM);
ttm_vt_unlock(&vmaster->lock);
drm_master_put(&vmw_fp->locked_master);
}
ttm_object_file_release(&vmw_fp->tfile);
kfree(vmw_fp);
@ -1036,6 +1047,55 @@ out_no_tfile:
return ret;
}
static struct vmw_master *vmw_master_check(struct drm_device *dev,
struct drm_file *file_priv,
unsigned int flags)
{
int ret;
struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
struct vmw_master *vmaster;
if (!drm_is_primary_client(file_priv) || !(flags & DRM_AUTH))
return NULL;
ret = mutex_lock_interruptible(&dev->master_mutex);
if (unlikely(ret != 0))
return ERR_PTR(-ERESTARTSYS);
if (drm_is_current_master(file_priv)) {
mutex_unlock(&dev->master_mutex);
return NULL;
}
/*
* Check if we were previously master, but now dropped. In that
* case, allow at least render node functionality.
*/
if (vmw_fp->locked_master) {
mutex_unlock(&dev->master_mutex);
if (flags & DRM_RENDER_ALLOW)
return NULL;
DRM_ERROR("Dropped master trying to access ioctl that "
"requires authentication.\n");
return ERR_PTR(-EACCES);
}
mutex_unlock(&dev->master_mutex);
/*
* Take the TTM lock. Possibly sleep waiting for the authenticating
* master to become master again, or for a SIGTERM if the
* authenticating master exits.
*/
vmaster = vmw_master(file_priv->master);
ret = ttm_read_lock(&vmaster->lock, true);
if (unlikely(ret != 0))
vmaster = ERR_PTR(ret);
return vmaster;
}
static long vmw_generic_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg,
long (*ioctl_func)(struct file *, unsigned int,
@ -1044,6 +1104,7 @@ static long vmw_generic_ioctl(struct file *filp, unsigned int cmd,
struct drm_file *file_priv = filp->private_data;
struct drm_device *dev = file_priv->minor->dev;
unsigned int nr = DRM_IOCTL_NR(cmd);
struct vmw_master *vmaster;
unsigned int flags;
long ret;
@ -1079,7 +1140,21 @@ static long vmw_generic_ioctl(struct file *filp, unsigned int cmd,
} else if (!drm_ioctl_flags(nr, &flags))
return -EINVAL;
return ioctl_func(filp, cmd, arg);
vmaster = vmw_master_check(dev, file_priv, flags);
if (IS_ERR(vmaster)) {
ret = PTR_ERR(vmaster);
if (ret != -ERESTARTSYS)
DRM_INFO("IOCTL ERROR Command %d, Error %ld.\n",
nr, ret);
return ret;
}
ret = ioctl_func(filp, cmd, arg);
if (vmaster)
ttm_read_unlock(&vmaster->lock);
return ret;
out_io_encoding:
DRM_ERROR("Invalid command format, ioctl %d\n",
@ -1106,10 +1181,65 @@ static void vmw_lastclose(struct drm_device *dev)
{
}
static void vmw_master_init(struct vmw_master *vmaster)
{
ttm_lock_init(&vmaster->lock);
}
static int vmw_master_create(struct drm_device *dev,
struct drm_master *master)
{
struct vmw_master *vmaster;
vmaster = kzalloc(sizeof(*vmaster), GFP_KERNEL);
if (unlikely(!vmaster))
return -ENOMEM;
vmw_master_init(vmaster);
ttm_lock_set_kill(&vmaster->lock, true, SIGTERM);
master->driver_priv = vmaster;
return 0;
}
static void vmw_master_destroy(struct drm_device *dev,
struct drm_master *master)
{
struct vmw_master *vmaster = vmw_master(master);
master->driver_priv = NULL;
kfree(vmaster);
}
static int vmw_master_set(struct drm_device *dev,
struct drm_file *file_priv,
bool from_open)
{
struct vmw_private *dev_priv = vmw_priv(dev);
struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
struct vmw_master *active = dev_priv->active_master;
struct vmw_master *vmaster = vmw_master(file_priv->master);
int ret = 0;
if (active) {
BUG_ON(active != &dev_priv->fbdev_master);
ret = ttm_vt_lock(&active->lock, false, vmw_fp->tfile);
if (unlikely(ret != 0))
return ret;
ttm_lock_set_kill(&active->lock, true, SIGTERM);
dev_priv->active_master = NULL;
}
ttm_lock_set_kill(&vmaster->lock, false, SIGTERM);
if (!from_open) {
ttm_vt_unlock(&vmaster->lock);
BUG_ON(vmw_fp->locked_master != file_priv->master);
drm_master_put(&vmw_fp->locked_master);
}
dev_priv->active_master = vmaster;
/*
* Inform a new master that the layout may have changed while
* it was gone.
@ -1124,10 +1254,31 @@ static void vmw_master_drop(struct drm_device *dev,
struct drm_file *file_priv)
{
struct vmw_private *dev_priv = vmw_priv(dev);
struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
struct vmw_master *vmaster = vmw_master(file_priv->master);
int ret;
/**
* Make sure the master doesn't disappear while we have
* it locked.
*/
vmw_fp->locked_master = drm_master_get(file_priv->master);
ret = ttm_vt_lock(&vmaster->lock, false, vmw_fp->tfile);
vmw_kms_legacy_hotspot_clear(dev_priv);
if (unlikely((ret != 0))) {
DRM_ERROR("Unable to lock TTM at VT switch.\n");
drm_master_put(&vmw_fp->locked_master);
}
ttm_lock_set_kill(&vmaster->lock, false, SIGTERM);
if (!dev_priv->enable_fb)
vmw_svga_disable(dev_priv);
dev_priv->active_master = &dev_priv->fbdev_master;
ttm_lock_set_kill(&dev_priv->fbdev_master.lock, false, SIGTERM);
ttm_vt_unlock(&dev_priv->fbdev_master.lock);
}
/**
@ -1406,6 +1557,8 @@ static struct drm_driver driver = {
.disable_vblank = vmw_disable_vblank,
.ioctls = vmw_ioctls,
.num_ioctls = ARRAY_SIZE(vmw_ioctls),
.master_create = vmw_master_create,
.master_destroy = vmw_master_destroy,
.master_set = vmw_master_set,
.master_drop = vmw_master_drop,
.open = vmw_driver_open,

139
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
View File

@ -44,9 +44,9 @@
#include <linux/sync_file.h>
#define VMWGFX_DRIVER_NAME "vmwgfx"
#define VMWGFX_DRIVER_DATE "20190328"
#define VMWGFX_DRIVER_DATE "20180704"
#define VMWGFX_DRIVER_MAJOR 2
#define VMWGFX_DRIVER_MINOR 16
#define VMWGFX_DRIVER_MINOR 15
#define VMWGFX_DRIVER_PATCHLEVEL 0
#define VMWGFX_FIFO_STATIC_SIZE (1024*1024)
#define VMWGFX_MAX_RELOCATIONS 2048
@ -81,30 +81,19 @@
#define VMW_RES_SHADER ttm_driver_type4
struct vmw_fpriv {
struct drm_master *locked_master;
struct ttm_object_file *tfile;
bool gb_aware; /* user-space is guest-backed aware */
};
/**
* struct vmw_buffer_object - TTM buffer object with vmwgfx additions
* @base: The TTM buffer object
* @res_tree: RB tree of resources using this buffer object as a backing MOB
* @pin_count: pin depth
* @dx_query_ctx: DX context if this buffer object is used as a DX query MOB
* @map: Kmap object for semi-persistent mappings
* @res_prios: Eviction priority counts for attached resources
* @dirty: structure for user-space dirty-tracking
*/
struct vmw_buffer_object {
struct ttm_buffer_object base;
struct rb_root res_tree;
struct list_head res_list;
s32 pin_count;
/* Not ref-counted. Protected by binding_mutex */
struct vmw_resource *dx_query_ctx;
/* Protected by reservation */
struct ttm_bo_kmap_obj map;
u32 res_prios[TTM_MAX_BO_PRIORITY];
struct vmw_bo_dirty *dirty;
};
/**
@ -135,8 +124,7 @@ struct vmw_res_func;
* @res_dirty: Resource contains data not yet in the backup buffer. Protected
* by resource reserved.
* @backup_dirty: Backup buffer contains data not yet in the HW resource.
* Protected by resource reserved.
* @coherent: Emulate coherency by tracking vm accesses.
* Protecte by resource reserved.
* @backup: The backup buffer if any. Protected by resource reserved.
* @backup_offset: Offset into the backup buffer if any. Protected by resource
* reserved. Note that only a few resource types can have a @backup_offset
@ -145,32 +133,28 @@ struct vmw_res_func;
* pin-count greater than zero. It is not on the resource LRU lists and its
* backup buffer is pinned. Hence it can't be evicted.
* @func: Method vtable for this resource. Immutable.
* @mob_node; Node for the MOB backup rbtree. Protected by @backup reserved.
* @lru_head: List head for the LRU list. Protected by @dev_priv::resource_lock.
* @mob_head: List head for the MOB backup list. Protected by @backup reserved.
* @binding_head: List head for the context binding list. Protected by
* the @dev_priv::binding_mutex
* @res_free: The resource destructor.
* @hw_destroy: Callback to destroy the resource on the device, as part of
* resource destruction.
*/
struct vmw_resource_dirty;
struct vmw_resource {
struct kref kref;
struct vmw_private *dev_priv;
int id;
u32 used_prio;
unsigned long backup_size;
u32 res_dirty : 1;
u32 backup_dirty : 1;
u32 coherent : 1;
bool res_dirty;
bool backup_dirty;
struct vmw_buffer_object *backup;
unsigned long backup_offset;
unsigned long pin_count;
const struct vmw_res_func *func;
struct rb_node mob_node;
struct list_head lru_head;
struct list_head mob_head;
struct list_head binding_head;
struct vmw_resource_dirty *dirty;
void (*res_free) (struct vmw_resource *res);
void (*hw_destroy) (struct vmw_resource *res);
};
@ -392,6 +376,10 @@ struct vmw_sw_context{
struct vmw_legacy_display;
struct vmw_overlay;
struct vmw_master {
struct ttm_lock lock;
};
struct vmw_vga_topology_state {
uint32_t width;
uint32_t height;
@ -554,8 +542,11 @@ struct vmw_private {
spinlock_t svga_lock;
/**
* PM management.
* Master management.
*/
struct vmw_master *active_master;
struct vmw_master fbdev_master;
struct notifier_block pm_nb;
bool refuse_hibernation;
bool suspend_locked;
@ -604,9 +595,6 @@ struct vmw_private {
/* Validation memory reservation */
struct vmw_validation_mem vvm;
/* VM operations */
struct vm_operations_struct vm_ops;
};
static inline struct vmw_surface *vmw_res_to_srf(struct vmw_resource *res)
@ -624,6 +612,11 @@ static inline struct vmw_fpriv *vmw_fpriv(struct drm_file *file_priv)
return (struct vmw_fpriv *)file_priv->driver_priv;
}
static inline struct vmw_master *vmw_master(struct drm_master *master)
{
return (struct vmw_master *) master->driver_priv;
}
/*
* The locking here is fine-grained, so that it is performed once
* for every read- and write operation. This is of course costly, but we
@ -676,8 +669,7 @@ extern void vmw_resource_unreference(struct vmw_resource **p_res);
extern struct vmw_resource *vmw_resource_reference(struct vmw_resource *res);
extern struct vmw_resource *
vmw_resource_reference_unless_doomed(struct vmw_resource *res);
extern int vmw_resource_validate(struct vmw_resource *res, bool intr,
bool dirtying);
extern int vmw_resource_validate(struct vmw_resource *res, bool intr);
extern int vmw_resource_reserve(struct vmw_resource *res, bool interruptible,
bool no_backup);
extern bool vmw_resource_needs_backup(const struct vmw_resource *res);
@ -717,23 +709,6 @@ extern void vmw_query_move_notify(struct ttm_buffer_object *bo,
extern int vmw_query_readback_all(struct vmw_buffer_object *dx_query_mob);
extern void vmw_resource_evict_all(struct vmw_private *dev_priv);
extern void vmw_resource_unbind_list(struct vmw_buffer_object *vbo);
void vmw_resource_mob_attach(struct vmw_resource *res);
void vmw_resource_mob_detach(struct vmw_resource *res);
void vmw_resource_dirty_update(struct vmw_resource *res, pgoff_t start,
pgoff_t end);
int vmw_resources_clean(struct vmw_buffer_object *vbo, pgoff_t start,
pgoff_t end, pgoff_t *num_prefault);
/**
* vmw_resource_mob_attached - Whether a resource currently has a mob attached
* @res: The resource
*
* Return: true if the resource has a mob attached, false otherwise.
*/
static inline bool vmw_resource_mob_attached(const struct vmw_resource *res)
{
return !RB_EMPTY_NODE(&res->mob_node);
}
/**
* vmw_user_resource_noref_release - release a user resource pointer looked up
@ -812,54 +787,6 @@ static inline void vmw_user_bo_noref_release(void)
ttm_base_object_noref_release();
}
/**
* vmw_bo_adjust_prio - Adjust the buffer object eviction priority
* according to attached resources
* @vbo: The struct vmw_buffer_object
*/
static inline void vmw_bo_prio_adjust(struct vmw_buffer_object *vbo)
{
int i = ARRAY_SIZE(vbo->res_prios);
while (i--) {
if (vbo->res_prios[i]) {
vbo->base.priority = i;
return;
}
}
vbo->base.priority = 3;
}
/**
* vmw_bo_prio_add - Notify a buffer object of a newly attached resource
* eviction priority
* @vbo: The struct vmw_buffer_object
* @prio: The resource priority
*
* After being notified, the code assigns the highest resource eviction priority
* to the backing buffer object (mob).
*/
static inline void vmw_bo_prio_add(struct vmw_buffer_object *vbo, int prio)
{
if (vbo->res_prios[prio]++ == 0)
vmw_bo_prio_adjust(vbo);
}
/**
* vmw_bo_prio_del - Notify a buffer object of a resource with a certain
* priority being removed
* @vbo: The struct vmw_buffer_object
* @prio: The resource priority
*
* After being notified, the code assigns the highest resource eviction priority
* to the backing buffer object (mob).
*/
static inline void vmw_bo_prio_del(struct vmw_buffer_object *vbo, int prio)
{
if (--vbo->res_prios[prio] == 0)
vmw_bo_prio_adjust(vbo);
}
/**
* Misc Ioctl functionality - vmwgfx_ioctl.c
@ -1089,6 +1016,7 @@ void vmw_kms_cursor_snoop(struct vmw_surface *srf,
int vmw_kms_write_svga(struct vmw_private *vmw_priv,
unsigned width, unsigned height, unsigned pitch,
unsigned bpp, unsigned depth);
void vmw_kms_idle_workqueues(struct vmw_master *vmaster);
bool vmw_kms_validate_mode_vram(struct vmw_private *dev_priv,
uint32_t pitch,
uint32_t height);
@ -1410,25 +1338,6 @@ int vmw_host_log(const char *log);
#define VMW_DEBUG_USER(fmt, ...) \
DRM_DEBUG_DRIVER(fmt, ##__VA_ARGS__)
/**
* VMW_DEBUG_KMS - Debug output for kernel mode-setting
*
* This macro is for debugging vmwgfx mode-setting code.
*/
#define VMW_DEBUG_KMS(fmt, ...) \
DRM_DEBUG_DRIVER(fmt, ##__VA_ARGS__)
/* Resource dirtying - vmwgfx_page_dirty.c */
void vmw_bo_dirty_scan(struct vmw_buffer_object *vbo);
int vmw_bo_dirty_add(struct vmw_buffer_object *vbo);
void vmw_bo_dirty_transfer_to_res(struct vmw_resource *res);
void vmw_bo_dirty_clear_res(struct vmw_resource *res);
void vmw_bo_dirty_release(struct vmw_buffer_object *vbo);
void vmw_bo_dirty_unmap(struct vmw_buffer_object *vbo,
pgoff_t start, pgoff_t end);
vm_fault_t vmw_bo_vm_fault(struct vm_fault *vmf);
vm_fault_t vmw_bo_vm_mkwrite(struct vm_fault *vmf);
/**
* Inline helper functions
*/

1
drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
View File

@ -2560,6 +2560,7 @@ static int vmw_cmd_dx_check_subresource(struct vmw_private *dev_priv,
offsetof(typeof(*cmd), sid));
cmd = container_of(header, typeof(*cmd), header);
return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
VMW_RES_DIRTY_NONE, user_surface_converter,
&cmd->sid, NULL);

23
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
View File

@ -1462,7 +1462,7 @@ static int vmw_kms_check_display_memory(struct drm_device *dev,
if (dev_priv->active_display_unit == vmw_du_screen_target &&
(drm_rect_width(&rects[i]) > dev_priv->stdu_max_width ||
drm_rect_height(&rects[i]) > dev_priv->stdu_max_height)) {
VMW_DEBUG_KMS("Screen size not supported.\n");
DRM_ERROR("Screen size not supported.\n");
return -EINVAL;
}
@ -1486,7 +1486,7 @@ static int vmw_kms_check_display_memory(struct drm_device *dev,
* limit on primary bounding box
*/
if (pixel_mem > dev_priv->prim_bb_mem) {
VMW_DEBUG_KMS("Combined output size too large.\n");
DRM_ERROR("Combined output size too large.\n");
return -EINVAL;
}
@ -1496,7 +1496,7 @@ static int vmw_kms_check_display_memory(struct drm_device *dev,
bb_mem = (u64) bounding_box.x2 * bounding_box.y2 * 4;
if (bb_mem > dev_priv->prim_bb_mem) {
VMW_DEBUG_KMS("Topology is beyond supported limits.\n");
DRM_ERROR("Topology is beyond supported limits.\n");
return -EINVAL;
}
}
@ -1645,7 +1645,6 @@ static int vmw_kms_check_topology(struct drm_device *dev,
struct vmw_connector_state *vmw_conn_state;
if (!du->pref_active && new_crtc_state->enable) {
VMW_DEBUG_KMS("Enabling a disabled display unit\n");
ret = -EINVAL;
goto clean;
}
@ -1702,10 +1701,8 @@ vmw_kms_atomic_check_modeset(struct drm_device *dev,
return ret;
ret = vmw_kms_check_implicit(dev, state);
if (ret) {
VMW_DEBUG_KMS("Invalid implicit state\n");
if (ret)
return ret;
}
if (!state->allow_modeset)
return ret;
@ -2350,9 +2347,6 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
if (!arg->num_outputs) {
struct drm_rect def_rect = {0, 0, 800, 600};
VMW_DEBUG_KMS("Default layout x1 = %d y1 = %d x2 = %d y2 = %d\n",
def_rect.x1, def_rect.y1,
def_rect.x2, def_rect.y2);
vmw_du_update_layout(dev_priv, 1, &def_rect);
return 0;
}
@ -2373,7 +2367,6 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
drm_rects = (struct drm_rect *)rects;
VMW_DEBUG_KMS("Layout count = %u\n", arg->num_outputs);
for (i = 0; i < arg->num_outputs; i++) {
struct drm_vmw_rect curr_rect;
@ -2390,10 +2383,6 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
drm_rects[i].x2 = curr_rect.x + curr_rect.w;
drm_rects[i].y2 = curr_rect.y + curr_rect.h;
VMW_DEBUG_KMS(" x1 = %d y1 = %d x2 = %d y2 = %d\n",
drm_rects[i].x1, drm_rects[i].y1,
drm_rects[i].x2, drm_rects[i].y2);
/*
* Currently this check is limiting the topology within
* mode_config->max (which actually is max texture size
@ -2404,9 +2393,7 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
if (drm_rects[i].x1 < 0 || drm_rects[i].y1 < 0 ||
drm_rects[i].x2 > mode_config->max_width ||
drm_rects[i].y2 > mode_config->max_height) {
VMW_DEBUG_KMS("Invalid layout %d %d %d %d\n",
drm_rects[i].x1, drm_rects[i].y1,
drm_rects[i].x2, drm_rects[i].y2);
DRM_ERROR("Invalid GUI layout.\n");
ret = -EINVAL;
goto out_free;
}

472
drivers/gpu/drm/vmwgfx/vmwgfx_page_dirty.c
View File

@ -1,472 +0,0 @@
// SPDX-License-Identifier: GPL-2.0 OR MIT
/**************************************************************************
*
* Copyright 2019 VMware, Inc., Palo Alto, CA., USA
*
* 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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 "vmwgfx_drv.h"
/*
* Different methods for tracking dirty:
* VMW_BO_DIRTY_PAGETABLE - Scan the pagetable for hardware dirty bits
* VMW_BO_DIRTY_MKWRITE - Write-protect page table entries and record write-
* accesses in the VM mkwrite() callback
*/
enum vmw_bo_dirty_method {
VMW_BO_DIRTY_PAGETABLE,
VMW_BO_DIRTY_MKWRITE,
};
/*
* No dirtied pages at scan trigger a transition to the _MKWRITE method,
* similarly a certain percentage of dirty pages trigger a transition to
* the _PAGETABLE method. How many triggers should we wait for before
* changing method?
*/
#define VMW_DIRTY_NUM_CHANGE_TRIGGERS 2
/* Percentage to trigger a transition to the _PAGETABLE method */
#define VMW_DIRTY_PERCENTAGE 10
/**
* struct vmw_bo_dirty - Dirty information for buffer objects
* @start: First currently dirty bit
* @end: Last currently dirty bit + 1
* @method: The currently used dirty method
* @change_count: Number of consecutive method change triggers
* @ref_count: Reference count for this structure
* @bitmap_size: The size of the bitmap in bits. Typically equal to the
* nuber of pages in the bo.
* @size: The accounting size for this struct.
* @bitmap: A bitmap where each bit represents a page. A set bit means a
* dirty page.
*/
struct vmw_bo_dirty {
unsigned long start;
unsigned long end;
enum vmw_bo_dirty_method method;
unsigned int change_count;
unsigned int ref_count;
unsigned long bitmap_size;
size_t size;
unsigned long bitmap[0];
};
/**
* vmw_bo_dirty_scan_pagetable - Perform a pagetable scan for dirty bits
* @vbo: The buffer object to scan
*
* Scans the pagetable for dirty bits. Clear those bits and modify the
* dirty structure with the results. This function may change the
* dirty-tracking method.
*/
static void vmw_bo_dirty_scan_pagetable(struct vmw_buffer_object *vbo)
{
struct vmw_bo_dirty *dirty = vbo->dirty;
pgoff_t offset = drm_vma_node_start(&vbo->base.vma_node);
struct address_space *mapping = vbo->base.bdev->dev_mapping;
pgoff_t num_marked;
num_marked = apply_as_clean(mapping,
offset, dirty->bitmap_size,
offset, &dirty->bitmap[0],
&dirty->start, &dirty->end);
if (num_marked == 0)
dirty->change_count++;
else
dirty->change_count = 0;
if (dirty->change_count > VMW_DIRTY_NUM_CHANGE_TRIGGERS) {
dirty->change_count = 0;
dirty->method = VMW_BO_DIRTY_MKWRITE;
apply_as_wrprotect(mapping,
offset, dirty->bitmap_size);
apply_as_clean(mapping,
offset, dirty->bitmap_size,
offset, &dirty->bitmap[0],
&dirty->start, &dirty->end);
}
}
/**
* vmw_bo_dirty_scan_mkwrite - Reset the mkwrite dirty-tracking method
* @vbo: The buffer object to scan
*
* Write-protect pages written to so that consecutive write accesses will
* trigger a call to mkwrite.
*
* This function may change the dirty-tracking method.
*/
static void vmw_bo_dirty_scan_mkwrite(struct vmw_buffer_object *vbo)
{
struct vmw_bo_dirty *dirty = vbo->dirty;
unsigned long offset = drm_vma_node_start(&vbo->base.vma_node);
struct address_space *mapping = vbo->base.bdev->dev_mapping;
pgoff_t num_marked;
if (dirty->end <= dirty->start)
return;
num_marked = apply_as_wrprotect(vbo->base.bdev->dev_mapping,
dirty->start + offset,
dirty->end - dirty->start);
if (100UL * num_marked / dirty->bitmap_size >
VMW_DIRTY_PERCENTAGE) {
dirty->change_count++;
} else {
dirty->change_count = 0;
}
if (dirty->change_count > VMW_DIRTY_NUM_CHANGE_TRIGGERS) {
pgoff_t start = 0;
pgoff_t end = dirty->bitmap_size;
dirty->method = VMW_BO_DIRTY_PAGETABLE;
apply_as_clean(mapping, offset, end, offset, &dirty->bitmap[0],
&start, &end);
bitmap_clear(&dirty->bitmap[0], 0, dirty->bitmap_size);
if (dirty->start < dirty->end)
bitmap_set(&dirty->bitmap[0], dirty->start,
dirty->end - dirty->start);
dirty->change_count = 0;
}
}
/**
* vmw_bo_dirty_scan - Scan for dirty pages and add them to the dirty
* tracking structure
* @vbo: The buffer object to scan
*
* This function may change the dirty tracking method.
*/
void vmw_bo_dirty_scan(struct vmw_buffer_object *vbo)
{
struct vmw_bo_dirty *dirty = vbo->dirty;
if (dirty->method == VMW_BO_DIRTY_PAGETABLE)
vmw_bo_dirty_scan_pagetable(vbo);
else
vmw_bo_dirty_scan_mkwrite(vbo);
}
/**
* vmw_bo_dirty_pre_unmap - write-protect and pick up dirty pages before
* an unmap_mapping_range operation.
* @vbo: The buffer object,
* @start: First page of the range within the buffer object.
* @end: Last page of the range within the buffer object + 1.
*
* If we're using the _PAGETABLE scan method, we may leak dirty pages
* when calling unmap_mapping_range(). This function makes sure we pick
* up all dirty pages.
*/
static void vmw_bo_dirty_pre_unmap(struct vmw_buffer_object *vbo,
pgoff_t start, pgoff_t end)
{
struct vmw_bo_dirty *dirty = vbo->dirty;
unsigned long offset = drm_vma_node_start(&vbo->base.vma_node);
struct address_space *mapping = vbo->base.bdev->dev_mapping;
if (dirty->method != VMW_BO_DIRTY_PAGETABLE || start >= end)
return;
apply_as_wrprotect(mapping, start + offset, end - start);
apply_as_clean(mapping, start + offset, end - start, offset,
&dirty->bitmap[0], &dirty->start, &dirty->end);
}
/**
* vmw_bo_dirty_unmap - Clear all ptes pointing to a range within a bo
* @vbo: The buffer object,
* @start: First page of the range within the buffer object.
* @end: Last page of the range within the buffer object + 1.
*
* This is similar to ttm_bo_unmap_virtual_locked() except it takes a subrange.
*/
void vmw_bo_dirty_unmap(struct vmw_buffer_object *vbo,
pgoff_t start, pgoff_t end)
{
unsigned long offset = drm_vma_node_start(&vbo->base.vma_node);
struct address_space *mapping = vbo->base.bdev->dev_mapping;
vmw_bo_dirty_pre_unmap(vbo, start, end);
unmap_shared_mapping_range(mapping, (offset + start) << PAGE_SHIFT,
(loff_t) (end - start) << PAGE_SHIFT);
}
/**
* vmw_bo_dirty_add - Add a dirty-tracking user to a buffer object
* @vbo: The buffer object
*
* This function registers a dirty-tracking user to a buffer object.
* A user can be for example a resource or a vma in a special user-space
* mapping.
*
* Return: Zero on success, -ENOMEM on memory allocation failure.
*/
int vmw_bo_dirty_add(struct vmw_buffer_object *vbo)
{
struct vmw_bo_dirty *dirty = vbo->dirty;
pgoff_t num_pages = vbo->base.num_pages;
size_t size, acc_size;
int ret;
static struct ttm_operation_ctx ctx = {
.interruptible = false,
.no_wait_gpu = false
};
if (dirty) {
dirty->ref_count++;
return 0;
}
size = sizeof(*dirty) + BITS_TO_LONGS(num_pages) * sizeof(long);
acc_size = ttm_round_pot(size);
ret = ttm_mem_global_alloc(&ttm_mem_glob, acc_size, &ctx);
if (ret) {
VMW_DEBUG_USER("Out of graphics memory for buffer object "
"dirty tracker.\n");
return ret;
}
dirty = kvzalloc(size, GFP_KERNEL);
if (!dirty) {
ret = -ENOMEM;
goto out_no_dirty;
}
dirty->size = acc_size;
dirty->bitmap_size = num_pages;
dirty->start = dirty->bitmap_size;
dirty->end = 0;
dirty->ref_count = 1;
if (num_pages < PAGE_SIZE / sizeof(pte_t)) {
dirty->method = VMW_BO_DIRTY_PAGETABLE;
} else {
struct address_space *mapping = vbo->base.bdev->dev_mapping;
pgoff_t offset = drm_vma_node_start(&vbo->base.vma_node);
dirty->method = VMW_BO_DIRTY_MKWRITE;
/* Write-protect and then pick up already dirty bits */
apply_as_wrprotect(mapping, offset, num_pages);
apply_as_clean(mapping, offset, num_pages, offset,
&dirty->bitmap[0], &dirty->start, &dirty->end);
}
vbo->dirty = dirty;
return 0;
out_no_dirty:
ttm_mem_global_free(&ttm_mem_glob, acc_size);
return ret;
}
/**
* vmw_bo_dirty_release - Release a dirty-tracking user from a buffer object
* @vbo: The buffer object
*
* This function releases a dirty-tracking user from a buffer object.
* If the reference count reaches zero, then the dirty-tracking object is
* freed and the pointer to it cleared.
*
* Return: Zero on success, -ENOMEM on memory allocation failure.
*/
void vmw_bo_dirty_release(struct vmw_buffer_object *vbo)
{
struct vmw_bo_dirty *dirty = vbo->dirty;
if (dirty && --dirty->ref_count == 0) {
size_t acc_size = dirty->size;
kvfree(dirty);
ttm_mem_global_free(&ttm_mem_glob, acc_size);
vbo->dirty = NULL;
}
}
/**
* vmw_bo_dirty_transfer_to_res - Pick up a resource's dirty region from
* its backing mob.
* @res: The resource
*
* This function will pick up all dirty ranges affecting the resource from
* it's backup mob, and call vmw_resource_dirty_update() once for each
* range. The transferred ranges will be cleared from the backing mob's
* dirty tracking.
*/
void vmw_bo_dirty_transfer_to_res(struct vmw_resource *res)
{
struct vmw_buffer_object *vbo = res->backup;
struct vmw_bo_dirty *dirty = vbo->dirty;
pgoff_t start, cur, end;
unsigned long res_start = res->backup_offset;
unsigned long res_end = res->backup_offset + res->backup_size;
WARN_ON_ONCE(res_start & ~PAGE_MASK);
res_start >>= PAGE_SHIFT;
res_end = DIV_ROUND_UP(res_end, PAGE_SIZE);
if (res_start >= dirty->end || res_end <= dirty->start)
return;
cur = max(res_start, dirty->start);
res_end = max(res_end, dirty->end);
while (cur < res_end) {
unsigned long num;
start = find_next_bit(&dirty->bitmap[0], res_end, cur);
if (start >= res_end)
break;
end = find_next_zero_bit(&dirty->bitmap[0], res_end, start + 1);
cur = end + 1;
num = end - start;
bitmap_clear(&dirty->bitmap[0], start, num);
vmw_resource_dirty_update(res, start, end);
}
if (res_start <= dirty->start && res_end > dirty->start)
dirty->start = res_end;
if (res_start < dirty->end && res_end >= dirty->end)
dirty->end = res_start;
}
/**
* vmw_bo_dirty_clear_res - Clear a resource's dirty region from
* its backing mob.
* @res: The resource
*
* This function will clear all dirty ranges affecting the resource from
* it's backup mob's dirty tracking.
*/
void vmw_bo_dirty_clear_res(struct vmw_resource *res)
{
unsigned long res_start = res->backup_offset;
unsigned long res_end = res->backup_offset + res->backup_size;
struct vmw_buffer_object *vbo = res->backup;
struct vmw_bo_dirty *dirty = vbo->dirty;
res_start >>= PAGE_SHIFT;
res_end = DIV_ROUND_UP(res_end, PAGE_SIZE);
if (res_start >= dirty->end || res_end <= dirty->start)
return;
res_start = max(res_start, dirty->start);
res_end = min(res_end, dirty->end);
bitmap_clear(&dirty->bitmap[0], res_start, res_end - res_start);
if (res_start <= dirty->start && res_end > dirty->start)
dirty->start = res_end;
if (res_start < dirty->end && res_end >= dirty->end)
dirty->end = res_start;
}
vm_fault_t vmw_bo_vm_mkwrite(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
vma->vm_private_data;
vm_fault_t ret;
unsigned long page_offset;
struct vmw_buffer_object *vbo =
container_of(bo, typeof(*vbo), base);
ret = ttm_bo_vm_reserve(bo, vmf);
if (ret)
return ret;
page_offset = vmf->pgoff - drm_vma_node_start(&bo->vma_node);
if (unlikely(page_offset >= bo->num_pages)) {
ret = VM_FAULT_SIGBUS;
goto out_unlock;
}
if (vbo->dirty && vbo->dirty->method == VMW_BO_DIRTY_MKWRITE &&
!test_bit(page_offset, &vbo->dirty->bitmap[0])) {
struct vmw_bo_dirty *dirty = vbo->dirty;
__set_bit(page_offset, &dirty->bitmap[0]);
dirty->start = min(dirty->start, page_offset);
dirty->end = max(dirty->end, page_offset + 1);
}
out_unlock:
reservation_object_unlock(bo->resv);
return ret;
}
vm_fault_t vmw_bo_vm_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
vma->vm_private_data;
struct vmw_buffer_object *vbo =
container_of(bo, struct vmw_buffer_object, base);
pgoff_t num_prefault;
pgprot_t prot;
vm_fault_t ret;
ret = ttm_bo_vm_reserve(bo, vmf);
if (ret)
return ret;
num_prefault = (vma->vm_flags & VM_RAND_READ) ? 1 :
TTM_BO_VM_NUM_PREFAULT;
if (vbo->dirty) {
pgoff_t allowed_prefault;
unsigned long page_offset;
page_offset = vmf->pgoff - drm_vma_node_start(&bo->vma_node);
if (page_offset >= bo->num_pages ||
vmw_resources_clean(vbo, page_offset,
page_offset + PAGE_SIZE,
&allowed_prefault)) {
ret = VM_FAULT_SIGBUS;
goto out_unlock;
}
num_prefault = min(num_prefault, allowed_prefault);
}
/*
* If we don't track dirty using the MKWRITE method, make sure
* sure the page protection is write-enabled so we don't get
* a lot of unnecessary write faults.
*/
if (vbo->dirty && vbo->dirty->method == VMW_BO_DIRTY_MKWRITE)
prot = vma->vm_page_prot;
else
prot = vm_get_page_prot(vma->vm_flags);
ret = ttm_bo_vm_fault_reserved(vmf, prot, num_prefault);
if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT))
return ret;
out_unlock:
reservation_object_unlock(bo->resv);
return ret;
}

245
drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
View File

@ -34,51 +34,6 @@
#define VMW_RES_EVICT_ERR_COUNT 10
/**
* vmw_resource_mob_attach - Mark a resource as attached to its backing mob
* @res: The resource
*/
void vmw_resource_mob_attach(struct vmw_resource *res)
{
struct vmw_buffer_object *backup = res->backup;
struct rb_node **new = &backup->res_tree.rb_node, *parent = NULL;
lockdep_assert_held(&backup->base.resv->lock.base);
res->used_prio = (res->res_dirty) ? res->func->dirty_prio :
res->func->prio;
while (*new) {
struct vmw_resource *this =
container_of(*new, struct vmw_resource, mob_node);
parent = *new;
new = (res->backup_offset < this->backup_offset) ?
&((*new)->rb_left) : &((*new)->rb_right);
}
rb_link_node(&res->mob_node, parent, new);
rb_insert_color(&res->mob_node, &backup->res_tree);
vmw_bo_prio_add(backup, res->used_prio);
}
/**
* vmw_resource_mob_detach - Mark a resource as detached from its backing mob
* @res: The resource
*/
void vmw_resource_mob_detach(struct vmw_resource *res)
{
struct vmw_buffer_object *backup = res->backup;
lockdep_assert_held(&backup->base.resv->lock.base);
if (vmw_resource_mob_attached(res)) {
rb_erase(&res->mob_node, &backup->res_tree);
RB_CLEAR_NODE(&res->mob_node);
vmw_bo_prio_del(backup, res->used_prio);
}
}
struct vmw_resource *vmw_resource_reference(struct vmw_resource *res)
{
kref_get(&res->kref);
@ -125,7 +80,7 @@ static void vmw_resource_release(struct kref *kref)
struct ttm_buffer_object *bo = &res->backup->base;
ttm_bo_reserve(bo, false, false, NULL);
if (vmw_resource_mob_attached(res) &&
if (!list_empty(&res->mob_head) &&
res->func->unbind != NULL) {
struct ttm_validate_buffer val_buf;
@ -134,11 +89,7 @@ static void vmw_resource_release(struct kref *kref)
res->func->unbind(res, false, &val_buf);
}
res->backup_dirty = false;
vmw_resource_mob_detach(res);
if (res->dirty)
res->func->dirty_free(res);
if (res->coherent)
vmw_bo_dirty_release(res->backup);
list_del_init(&res->mob_head);
ttm_bo_unreserve(bo);
vmw_bo_unreference(&res->backup);
}
@ -220,17 +171,14 @@ int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res,
res->res_free = res_free;
res->dev_priv = dev_priv;
res->func = func;
RB_CLEAR_NODE(&res->mob_node);
INIT_LIST_HEAD(&res->lru_head);
INIT_LIST_HEAD(&res->mob_head);
INIT_LIST_HEAD(&res->binding_head);
res->id = -1;
res->backup = NULL;
res->backup_offset = 0;
res->backup_dirty = false;
res->res_dirty = false;
res->coherent = false;
res->used_prio = 3;
res->dirty = NULL;
if (delay_id)
return 0;
else
@ -395,8 +343,7 @@ out_no_bo:
* should be retried once resources have been freed up.
*/
static int vmw_resource_do_validate(struct vmw_resource *res,
struct ttm_validate_buffer *val_buf,
bool dirtying)
struct ttm_validate_buffer *val_buf)
{
int ret = 0;
const struct vmw_res_func *func = res->func;
@ -408,47 +355,14 @@ static int vmw_resource_do_validate(struct vmw_resource *res,
}
if (func->bind &&
((func->needs_backup && !vmw_resource_mob_attached(res) &&
((func->needs_backup && list_empty(&res->mob_head) &&
val_buf->bo != NULL) ||
(!func->needs_backup && val_buf->bo != NULL))) {
ret = func->bind(res, val_buf);
if (unlikely(ret != 0))
goto out_bind_failed;
if (func->needs_backup)
vmw_resource_mob_attach(res);
}
/*
* Handle the case where the backup mob is marked coherent but
* the resource isn't.
*/
if (func->dirty_alloc && vmw_resource_mob_attached(res) &&
!res->coherent) {
if (res->backup->dirty && !res->dirty) {
ret = func->dirty_alloc(res);
if (ret)
return ret;
} else if (!res->backup->dirty && res->dirty) {
func->dirty_free(res);
}
}
/*
* Transfer the dirty regions to the resource and update
* the resource.
*/
if (res->dirty) {
if (dirtying && !res->res_dirty) {
pgoff_t start = res->backup_offset >> PAGE_SHIFT;
pgoff_t end = __KERNEL_DIV_ROUND_UP
(res->backup_offset + res->backup_size,
PAGE_SIZE);
vmw_bo_dirty_unmap(res->backup, start, end);
}
vmw_bo_dirty_transfer_to_res(res);
return func->dirty_sync(res);
list_add_tail(&res->mob_head, &res->backup->res_list);
}
return 0;
@ -488,29 +402,19 @@ void vmw_resource_unreserve(struct vmw_resource *res,
if (switch_backup && new_backup != res->backup) {
if (res->backup) {
vmw_resource_mob_detach(res);
if (res->coherent)
vmw_bo_dirty_release(res->backup);
lockdep_assert_held(&res->backup->base.resv->lock.base);
list_del_init(&res->mob_head);
vmw_bo_unreference(&res->backup);
}
if (new_backup) {
res->backup = vmw_bo_reference(new_backup);
/*
* The validation code should already have added a
* dirty tracker here.
*/
WARN_ON(res->coherent && !new_backup->dirty);
vmw_resource_mob_attach(res);
lockdep_assert_held(&new_backup->base.resv->lock.base);
list_add_tail(&res->mob_head, &new_backup->res_list);
} else {
res->backup = NULL;
}
} else if (switch_backup && res->coherent) {
vmw_bo_dirty_release(res->backup);
}
if (switch_backup)
res->backup_offset = new_backup_offset;
@ -565,7 +469,7 @@ vmw_resource_check_buffer(struct ww_acquire_ctx *ticket,
if (unlikely(ret != 0))
goto out_no_reserve;
if (res->func->needs_backup && !vmw_resource_mob_attached(res))
if (res->func->needs_backup && list_empty(&res->mob_head))
return 0;
backup_dirty = res->backup_dirty;
@ -670,11 +574,11 @@ static int vmw_resource_do_evict(struct ww_acquire_ctx *ticket,
return ret;
if (unlikely(func->unbind != NULL &&
(!func->needs_backup || vmw_resource_mob_attached(res)))) {
(!func->needs_backup || !list_empty(&res->mob_head)))) {
ret = func->unbind(res, res->res_dirty, &val_buf);
if (unlikely(ret != 0))
goto out_no_unbind;
vmw_resource_mob_detach(res);
list_del_init(&res->mob_head);
}
ret = func->destroy(res);
res->backup_dirty = true;
@ -691,7 +595,6 @@ out_no_unbind:
* to the device.
* @res: The resource to make visible to the device.
* @intr: Perform waits interruptible if possible.
* @dirtying: Pending GPU operation will dirty the resource
*
* On succesful return, any backup DMA buffer pointed to by @res->backup will
* be reserved and validated.
@ -701,8 +604,7 @@ out_no_unbind:
* Return: Zero on success, -ERESTARTSYS if interrupted, negative error code
* on failure.
*/
int vmw_resource_validate(struct vmw_resource *res, bool intr,
bool dirtying)
int vmw_resource_validate(struct vmw_resource *res, bool intr)
{
int ret;
struct vmw_resource *evict_res;
@ -719,7 +621,7 @@ int vmw_resource_validate(struct vmw_resource *res, bool intr,
if (res->backup)
val_buf.bo = &res->backup->base;
do {
ret = vmw_resource_do_validate(res, &val_buf, dirtying);
ret = vmw_resource_do_validate(res, &val_buf);
if (likely(ret != -EBUSY))
break;
@ -758,7 +660,7 @@ int vmw_resource_validate(struct vmw_resource *res, bool intr,
if (unlikely(ret != 0))
goto out_no_validate;
else if (!res->func->needs_backup && res->backup) {
WARN_ON_ONCE(vmw_resource_mob_attached(res));
list_del_init(&res->mob_head);
vmw_bo_unreference(&res->backup);
}
@ -782,23 +684,22 @@ out_no_validate:
*/
void vmw_resource_unbind_list(struct vmw_buffer_object *vbo)
{
struct vmw_resource *res, *next;
struct ttm_validate_buffer val_buf = {
.bo = &vbo->base,
.num_shared = 0
};
lockdep_assert_held(&vbo->base.resv->lock.base);
while (!RB_EMPTY_ROOT(&vbo->res_tree)) {
struct rb_node *node = vbo->res_tree.rb_node;
struct vmw_resource *res =
container_of(node, struct vmw_resource, mob_node);
if (!WARN_ON_ONCE(!res->func->unbind))
(void) res->func->unbind(res, res->res_dirty, &val_buf);
list_for_each_entry_safe(res, next, &vbo->res_list, mob_head) {
if (!res->func->unbind)
continue;
(void) res->func->unbind(res, res->res_dirty, &val_buf);
res->backup_dirty = true;
res->res_dirty = false;
vmw_resource_mob_detach(res);
list_del_init(&res->mob_head);
}
(void) ttm_bo_wait(&vbo->base, false, false);
@ -1019,7 +920,7 @@ int vmw_resource_pin(struct vmw_resource *res, bool interruptible)
/* Do we really need to pin the MOB as well? */
vmw_bo_pin_reserved(vbo, true);
}
ret = vmw_resource_validate(res, interruptible, true);
ret = vmw_resource_validate(res, interruptible);
if (vbo)
ttm_bo_unreserve(&vbo->base);
if (ret)
@ -1079,101 +980,3 @@ enum vmw_res_type vmw_res_type(const struct vmw_resource *res)
{
return res->func->res_type;
}
/**
* vmw_resource_update_dirty - Update a resource's dirty tracker with a
* sequential range of touched backing store memory.
* @res: The resource.
* @start: The first page touched.
* @end: The last page touched + 1.
*/
void vmw_resource_dirty_update(struct vmw_resource *res, pgoff_t start,
pgoff_t end)
{
if (res->dirty)
res->func->dirty_range_add(res, start << PAGE_SHIFT,
end << PAGE_SHIFT);
}
/**
* vmw_resources_clean - Clean resources intersecting a mob range
* @vbo: The mob buffer object
* @start: The mob page offset starting the range
* @end: The mob page offset ending the range
* @num_prefault: Returns how many pages including the first have been
* cleaned and are ok to prefault
*/
int vmw_resources_clean(struct vmw_buffer_object *vbo, pgoff_t start,
pgoff_t end, pgoff_t *num_prefault)
{
struct rb_node *cur = vbo->res_tree.rb_node;
struct vmw_resource *found = NULL;
unsigned long res_start = start << PAGE_SHIFT;
unsigned long res_end = end << PAGE_SHIFT;
unsigned long last_cleaned = 0;
/*
* Find the resource with lowest backup_offset that intersects the
* range.
*/
while (cur) {
struct vmw_resource *cur_res =
container_of(cur, struct vmw_resource, mob_node);
if (cur_res->backup_offset >= res_end) {
cur = cur->rb_left;
} else if (cur_res->backup_offset + cur_res->backup_size <=
res_start) {
cur = cur->rb_right;
} else {
found = cur_res;
cur = cur->rb_left;
/* Continue to look for resources with lower offsets */
}
}
/*
* In order of increasing backup_offset, clean dirty resorces
* intersecting the range.
*/
while (found) {
if (found->res_dirty) {
int ret;
if (!found->func->clean)
return -EINVAL;
ret = found->func->clean(found);
if (ret)
return ret;
found->res_dirty = false;
}
last_cleaned = found->backup_offset + found->backup_size;
cur = rb_next(&found->mob_node);
if (!cur)
break;
found = container_of(cur, struct vmw_resource, mob_node);
if (found->backup_offset >= res_end)
break;
}
/*
* Set number of pages allowed prefaulting and fence the buffer object
*/
*num_prefault = 1;
if (last_cleaned > res_start) {
struct ttm_buffer_object *bo = &vbo->base;
*num_prefault = __KERNEL_DIV_ROUND_UP(last_cleaned - res_start,
PAGE_SIZE);
vmw_bo_fence_single(bo, NULL);
if (bo->moving)
dma_fence_put(bo->moving);
bo->moving = dma_fence_get
(reservation_object_get_excl(bo->resv));
}
return 0;
}

15
drivers/gpu/drm/vmwgfx/vmwgfx_resource_priv.h
View File

@ -71,13 +71,6 @@ struct vmw_user_resource_conv {
* @commit_notify: If the resource is a command buffer managed resource,
* callback to notify that a define or remove command
* has been committed to the device.
* @dirty_alloc: Allocate a dirty tracker. NULL if dirty-tracking is not
* supported.
* @dirty_free: Free the dirty tracker.
* @dirty_sync: Upload the dirty mob contents to the resource.
* @dirty_add_range: Add a sequential dirty range to the resource
* dirty tracker.
* @clean: Clean the resource.
*/
struct vmw_res_func {
enum vmw_res_type res_type;
@ -85,8 +78,6 @@ struct vmw_res_func {
const char *type_name;
struct ttm_placement *backup_placement;
bool may_evict;
u32 prio;
u32 dirty_prio;
int (*create) (struct vmw_resource *res);
int (*destroy) (struct vmw_resource *res);
@ -97,12 +88,6 @@ struct vmw_res_func {
struct ttm_validate_buffer *val_buf);
void (*commit_notify)(struct vmw_resource *res,
enum vmw_cmdbuf_res_state state);
int (*dirty_alloc)(struct vmw_resource *res);
void (*dirty_free)(struct vmw_resource *res);
int (*dirty_sync)(struct vmw_resource *res);
void (*dirty_range_add)(struct vmw_resource *res, size_t start,
size_t end);
int (*clean)(struct vmw_resource *res);
};
/**

8
drivers/gpu/drm/vmwgfx/vmwgfx_shader.c
View File

@ -95,8 +95,6 @@ static const struct vmw_res_func vmw_gb_shader_func = {
.res_type = vmw_res_shader,
.needs_backup = true,
.may_evict = true,
.prio = 3,
.dirty_prio = 3,
.type_name = "guest backed shaders",
.backup_placement = &vmw_mob_placement,
.create = vmw_gb_shader_create,
@ -108,9 +106,7 @@ static const struct vmw_res_func vmw_gb_shader_func = {
static const struct vmw_res_func vmw_dx_shader_func = {
.res_type = vmw_res_shader,
.needs_backup = true,
.may_evict = true,
.prio = 3,
.dirty_prio = 3,
.may_evict = false,
.type_name = "dx shaders",
.backup_placement = &vmw_mob_placement,
.create = vmw_dx_shader_create,
@ -427,7 +423,7 @@ static int vmw_dx_shader_create(struct vmw_resource *res)
WARN_ON_ONCE(!shader->committed);
if (vmw_resource_mob_attached(res)) {
if (!list_empty(&res->mob_head)) {
mutex_lock(&dev_priv->binding_mutex);
ret = vmw_dx_shader_unscrub(res);
mutex_unlock(&dev_priv->binding_mutex);

405
drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
View File

@ -68,20 +68,6 @@ struct vmw_surface_offset {
uint32_t bo_offset;
};
/**
* vmw_surface_dirty - Surface dirty-tracker
* @cache: Cached layout information of the surface.
* @size: Accounting size for the struct vmw_surface_dirty.
* @num_subres: Number of subresources.
* @boxes: Array of SVGA3dBoxes indicating dirty regions. One per subresource.
*/
struct vmw_surface_dirty {
struct svga3dsurface_cache cache;
size_t size;
u32 num_subres;
SVGA3dBox boxes[0];
};
static void vmw_user_surface_free(struct vmw_resource *res);
static struct vmw_resource *
vmw_user_surface_base_to_res(struct ttm_base_object *base);
@ -110,13 +96,6 @@ vmw_gb_surface_reference_internal(struct drm_device *dev,
struct drm_vmw_gb_surface_ref_ext_rep *rep,
struct drm_file *file_priv);
static void vmw_surface_dirty_free(struct vmw_resource *res);
static int vmw_surface_dirty_alloc(struct vmw_resource *res);
static int vmw_surface_dirty_sync(struct vmw_resource *res);
static void vmw_surface_dirty_range_add(struct vmw_resource *res, size_t start,
size_t end);
static int vmw_surface_clean(struct vmw_resource *res);
static const struct vmw_user_resource_conv user_surface_conv = {
.object_type = VMW_RES_SURFACE,
.base_obj_to_res = vmw_user_surface_base_to_res,
@ -133,8 +112,6 @@ static const struct vmw_res_func vmw_legacy_surface_func = {
.res_type = vmw_res_surface,
.needs_backup = false,
.may_evict = true,
.prio = 1,
.dirty_prio = 1,
.type_name = "legacy surfaces",
.backup_placement = &vmw_srf_placement,
.create = &vmw_legacy_srf_create,
@ -147,19 +124,12 @@ static const struct vmw_res_func vmw_gb_surface_func = {
.res_type = vmw_res_surface,
.needs_backup = true,
.may_evict = true,
.prio = 1,
.dirty_prio = 2,
.type_name = "guest backed surfaces",
.backup_placement = &vmw_mob_placement,
.create = vmw_gb_surface_create,
.destroy = vmw_gb_surface_destroy,
.bind = vmw_gb_surface_bind,
.unbind = vmw_gb_surface_unbind,
.dirty_alloc = vmw_surface_dirty_alloc,
.dirty_free = vmw_surface_dirty_free,
.dirty_sync = vmw_surface_dirty_sync,
.dirty_range_add = vmw_surface_dirty_range_add,
.clean = vmw_surface_clean,
.unbind = vmw_gb_surface_unbind
};
/**
@ -667,7 +637,6 @@ static void vmw_user_surface_free(struct vmw_resource *res)
struct vmw_private *dev_priv = srf->res.dev_priv;
uint32_t size = user_srf->size;
WARN_ON_ONCE(res->dirty);
if (user_srf->master)
drm_master_put(&user_srf->master);
kfree(srf->offsets);
@ -946,6 +915,12 @@ vmw_surface_handle_reference(struct vmw_private *dev_priv,
if (unlikely(drm_is_render_client(file_priv)))
require_exist = true;
if (READ_ONCE(vmw_fpriv(file_priv)->locked_master)) {
DRM_ERROR("Locked master refused legacy "
"surface reference.\n");
return -EACCES;
}
handle = u_handle;
}
@ -1195,16 +1170,10 @@ static int vmw_gb_surface_bind(struct vmw_resource *res,
cmd2->header.id = SVGA_3D_CMD_UPDATE_GB_SURFACE;
cmd2->header.size = sizeof(cmd2->body);
cmd2->body.sid = res->id;
res->backup_dirty = false;
}
vmw_fifo_commit(dev_priv, submit_size);
if (res->backup->dirty && res->backup_dirty) {
/* We've just made a full upload. Cear dirty regions. */
vmw_bo_dirty_clear_res(res);
}
res->backup_dirty = false;
return 0;
}
@ -1669,8 +1638,7 @@ vmw_gb_surface_define_internal(struct drm_device *dev,
}
}
} else if (req->base.drm_surface_flags &
(drm_vmw_surface_flag_create_buffer |
drm_vmw_surface_flag_coherent))
drm_vmw_surface_flag_create_buffer)
ret = vmw_user_bo_alloc(dev_priv, tfile,
res->backup_size,
req->base.drm_surface_flags &
@ -1684,26 +1652,6 @@ vmw_gb_surface_define_internal(struct drm_device *dev,
goto out_unlock;
}
if (req->base.drm_surface_flags & drm_vmw_surface_flag_coherent) {
struct vmw_buffer_object *backup = res->backup;
ttm_bo_reserve(&backup->base, false, false, NULL);
if (!res->func->dirty_alloc)
ret = -EINVAL;
if (!ret)
ret = vmw_bo_dirty_add(backup);
if (!ret) {
res->coherent = true;
ret = res->func->dirty_alloc(res);
}
ttm_bo_unreserve(&backup->base);
if (ret) {
vmw_resource_unreference(&res);
goto out_unlock;
}
}
tmp = vmw_resource_reference(res);
ret = ttm_prime_object_init(tfile, res->backup_size, &user_srf->prime,
req->base.drm_surface_flags &
@ -1812,338 +1760,3 @@ out_bad_resource:
return ret;
}
/**
* vmw_subres_dirty_add - Add a dirty region to a subresource
* @dirty: The surfaces's dirty tracker.
* @loc_start: The location corresponding to the start of the region.
* @loc_end: The location corresponding to the end of the region.
*
* As we are assuming that @loc_start and @loc_end represent a sequential
* range of backing store memory, if the region spans multiple lines then
* regardless of the x coordinate, the full lines are dirtied.
* Correspondingly if the region spans multiple z slices, then full rather
* than partial z slices are dirtied.
*/
static void vmw_subres_dirty_add(struct vmw_surface_dirty *dirty,
const struct svga3dsurface_loc *loc_start,
const struct svga3dsurface_loc *loc_end)
{
const struct svga3dsurface_cache *cache = &dirty->cache;
SVGA3dBox *box = &dirty->boxes[loc_start->sub_resource];
u32 mip = loc_start->sub_resource % cache->num_mip_levels;
const struct drm_vmw_size *size = &cache->mip[mip].size;
u32 box_c2 = box->z + box->d;
if (WARN_ON(loc_start->sub_resource >= dirty->num_subres))
return;
if (box->d == 0 || box->z > loc_start->z)
box->z = loc_start->z;
if (box_c2 < loc_end->z)
box->d = loc_end->z - box->z;
if (loc_start->z + 1 == loc_end->z) {
box_c2 = box->y + box->h;
if (box->h == 0 || box->y > loc_start->y)
box->y = loc_start->y;
if (box_c2 < loc_end->y)
box->h = loc_end->y - box->y;
if (loc_start->y + 1 == loc_end->y) {
box_c2 = box->x + box->w;
if (box->w == 0 || box->x > loc_start->x)
box->x = loc_start->x;
if (box_c2 < loc_end->x)
box->w = loc_end->x - box->x;
} else {
box->x = 0;
box->w = size->width;
}
} else {
box->y = 0;
box->h = size->height;
box->x = 0;
box->w = size->width;
}
}
/**
* vmw_subres_dirty_full - Mark a full subresource as dirty
* @dirty: The surface's dirty tracker.
* @subres: The subresource
*/
static void vmw_subres_dirty_full(struct vmw_surface_dirty *dirty, u32 subres)
{
const struct svga3dsurface_cache *cache = &dirty->cache;
u32 mip = subres % cache->num_mip_levels;
const struct drm_vmw_size *size = &cache->mip[mip].size;
SVGA3dBox *box = &dirty->boxes[subres];
box->x = 0;
box->y = 0;
box->z = 0;
box->w = size->width;
box->h = size->height;
box->d = size->depth;
}
/*
* vmw_surface_tex_dirty_add_range - The dirty_add_range callback for texture
* surfaces.
*/
static void vmw_surface_tex_dirty_range_add(struct vmw_resource *res,
size_t start, size_t end)
{
struct vmw_surface_dirty *dirty =
(struct vmw_surface_dirty *) res->dirty;
size_t backup_end = res->backup_offset + res->backup_size;
struct svga3dsurface_loc loc1, loc2;
const struct svga3dsurface_cache *cache;
start = max_t(size_t, start, res->backup_offset) - res->backup_offset;
end = min(end, backup_end) - res->backup_offset;
cache = &dirty->cache;
svga3dsurface_get_loc(cache, &loc1, start);
svga3dsurface_get_loc(cache, &loc2, end - 1);
svga3dsurface_inc_loc(cache, &loc2);
if (loc1.sub_resource + 1 == loc2.sub_resource) {
/* Dirty range covers a single sub-resource */
vmw_subres_dirty_add(dirty, &loc1, &loc2);
} else {
/* Dirty range covers multiple sub-resources */
struct svga3dsurface_loc loc_min, loc_max;
u32 sub_res = loc1.sub_resource;
svga3dsurface_max_loc(cache, loc1.sub_resource, &loc_max);
vmw_subres_dirty_add(dirty, &loc1, &loc_max);
svga3dsurface_min_loc(cache, loc2.sub_resource - 1, &loc_min);
vmw_subres_dirty_add(dirty, &loc_min, &loc2);
for (sub_res = loc1.sub_resource + 1;
sub_res < loc2.sub_resource - 1; ++sub_res)
vmw_subres_dirty_full(dirty, sub_res);
}
}
/*
* vmw_surface_tex_dirty_add_range - The dirty_add_range callback for buffer
* surfaces.
*/
static void vmw_surface_buf_dirty_range_add(struct vmw_resource *res,
size_t start, size_t end)
{
struct vmw_surface_dirty *dirty =
(struct vmw_surface_dirty *) res->dirty;
const struct svga3dsurface_cache *cache = &dirty->cache;
size_t backup_end = res->backup_offset + cache->mip_chain_bytes;
SVGA3dBox *box = &dirty->boxes[0];
u32 box_c2;
box->h = box->d = 1;
start = max_t(size_t, start, res->backup_offset) - res->backup_offset;
end = min(end, backup_end) - res->backup_offset;
box_c2 = box->x + box->w;
if (box->w == 0 || box->x > start)
box->x = start;
if (box_c2 < end)
box->w = end - box->x;
}
/*
* vmw_surface_tex_dirty_add_range - The dirty_add_range callback for surfaces
*/
static void vmw_surface_dirty_range_add(struct vmw_resource *res, size_t start,
size_t end)
{
struct vmw_surface *srf = vmw_res_to_srf(res);
if (WARN_ON(end <= res->backup_offset ||
start >= res->backup_offset + res->backup_size))
return;
if (srf->format == SVGA3D_BUFFER)
vmw_surface_buf_dirty_range_add(res, start, end);
else
vmw_surface_tex_dirty_range_add(res, start, end);
}
/*
* vmw_surface_dirty_sync - The surface's dirty_sync callback.
*/
static int vmw_surface_dirty_sync(struct vmw_resource *res)
{
struct vmw_private *dev_priv = res->dev_priv;
bool has_dx = 0;
u32 i, num_dirty;
struct vmw_surface_dirty *dirty =
(struct vmw_surface_dirty *) res->dirty;
size_t alloc_size;
const struct svga3dsurface_cache *cache = &dirty->cache;
struct {
SVGA3dCmdHeader header;
SVGA3dCmdDXUpdateSubResource body;
} *cmd1;
struct {
SVGA3dCmdHeader header;
SVGA3dCmdUpdateGBImage body;
} *cmd2;
void *cmd;
num_dirty = 0;
for (i = 0; i < dirty->num_subres; ++i) {
const SVGA3dBox *box = &dirty->boxes[i];
if (box->d)
num_dirty++;
}
if (!num_dirty)
goto out;
alloc_size = num_dirty * ((has_dx) ? sizeof(*cmd1) : sizeof(*cmd2));
cmd = VMW_FIFO_RESERVE(dev_priv, alloc_size);
if (!cmd)
return -ENOMEM;
cmd1 = cmd;
cmd2 = cmd;
for (i = 0; i < dirty->num_subres; ++i) {
const SVGA3dBox *box = &dirty->boxes[i];
if (!box->d)
continue;
/*
* DX_UPDATE_SUBRESOURCE is aware of array surfaces.
* UPDATE_GB_IMAGE is not.
*/
if (has_dx) {
cmd1->header.id = SVGA_3D_CMD_DX_UPDATE_SUBRESOURCE;
cmd1->header.size = sizeof(cmd1->body);
cmd1->body.sid = res->id;
cmd1->body.subResource = i;
cmd1->body.box = *box;
cmd1++;
} else {
cmd2->header.id = SVGA_3D_CMD_UPDATE_GB_IMAGE;
cmd2->header.size = sizeof(cmd2->body);
cmd2->body.image.sid = res->id;
cmd2->body.image.face = i / cache->num_mip_levels;
cmd2->body.image.mipmap = i -
(cache->num_mip_levels * cmd2->body.image.face);
cmd2->body.box = *box;
cmd2++;
}
}
vmw_fifo_commit(dev_priv, alloc_size);
out:
memset(&dirty->boxes[0], 0, sizeof(dirty->boxes[0]) *
dirty->num_subres);
return 0;
}
/*
* vmw_surface_dirty_alloc - The surface's dirty_alloc callback.
*/
static int vmw_surface_dirty_alloc(struct vmw_resource *res)
{
struct vmw_surface *srf = vmw_res_to_srf(res);
struct vmw_surface_dirty *dirty;
u32 num_layers = 1;
u32 num_mip;
u32 num_subres;
u32 num_samples;
size_t dirty_size, acc_size;
static struct ttm_operation_ctx ctx = {
.interruptible = false,
.no_wait_gpu = false
};
int ret;
if (srf->array_size)
num_layers = srf->array_size;
else if (srf->flags & SVGA3D_SURFACE_CUBEMAP)
num_layers *= SVGA3D_MAX_SURFACE_FACES;
num_mip = srf->mip_levels[0];
if (!num_mip)
num_mip = 1;
num_subres = num_layers * num_mip;
dirty_size = sizeof(*dirty) + num_subres * sizeof(dirty->boxes[0]);
acc_size = ttm_round_pot(dirty_size);
ret = ttm_mem_global_alloc(vmw_mem_glob(res->dev_priv),
acc_size, &ctx);
if (ret) {
VMW_DEBUG_USER("Out of graphics memory for surface "
"dirty tracker.\n");
return ret;
}
dirty = kvzalloc(dirty_size, GFP_KERNEL);
if (!dirty) {
ret = -ENOMEM;
goto out_no_dirty;
}
num_samples = max_t(u32, 1, srf->multisample_count);
ret = svga3dsurface_setup_cache(&srf->base_size, srf->format, num_mip,
num_layers, num_samples, &dirty->cache);
if (ret)
goto out_no_cache;
dirty->num_subres = num_subres;
dirty->size = acc_size;
res->dirty = (struct vmw_resource_dirty *) dirty;
return 0;
out_no_cache:
kvfree(dirty);
out_no_dirty:
ttm_mem_global_free(vmw_mem_glob(res->dev_priv), acc_size);
return ret;
}
/*
* vmw_surface_dirty_free - The surface's dirty_free callback
*/
static void vmw_surface_dirty_free(struct vmw_resource *res)
{
struct vmw_surface_dirty *dirty =
(struct vmw_surface_dirty *) res->dirty;
size_t acc_size = dirty->size;
kvfree(dirty);
ttm_mem_global_free(vmw_mem_glob(res->dev_priv), acc_size);
res->dirty = NULL;
}
/*
* vmw_surface_clean - The surface's clean callback
*/
static int vmw_surface_clean(struct vmw_resource *res)
{
struct vmw_private *dev_priv = res->dev_priv;
size_t alloc_size;
struct {
SVGA3dCmdHeader header;
SVGA3dCmdReadbackGBSurface body;
} *cmd;
alloc_size = sizeof(*cmd);
cmd = VMW_FIFO_RESERVE(dev_priv, alloc_size);
if (!cmd)
return -ENOMEM;
cmd->header.id = SVGA_3D_CMD_READBACK_GB_SURFACE;
cmd->header.size = sizeof(cmd->body);
cmd->body.sid = res->id;
vmw_fifo_commit(dev_priv, alloc_size);
return 0;
}

74
drivers/gpu/drm/vmwgfx/vmwgfx_validation.c
View File

@ -33,8 +33,6 @@
* struct vmw_validation_bo_node - Buffer object validation metadata.
* @base: Metadata used for TTM reservation- and validation.
* @hash: A hash entry used for the duplicate detection hash table.
* @coherent_count: If switching backup buffers, number of new coherent
* resources that will have this buffer as a backup buffer.
* @as_mob: Validate as mob.
* @cpu_blit: Validate for cpu blit access.
*
@ -44,7 +42,6 @@
struct vmw_validation_bo_node {
struct ttm_validate_buffer base;
struct drm_hash_item hash;
unsigned int coherent_count;
u32 as_mob : 1;
u32 cpu_blit : 1;
};
@ -462,19 +459,6 @@ int vmw_validation_res_reserve(struct vmw_validation_context *ctx,
if (ret)
goto out_unreserve;
}
if (val->switching_backup && val->new_backup &&
res->coherent) {
struct vmw_validation_bo_node *bo_node =
vmw_validation_find_bo_dup(ctx,
val->new_backup);
if (WARN_ON(!bo_node)) {
ret = -EINVAL;
goto out_unreserve;
}
bo_node->coherent_count++;
}
}
return 0;
@ -578,9 +562,6 @@ int vmw_validation_bo_validate(struct vmw_validation_context *ctx, bool intr)
int ret;
list_for_each_entry(entry, &ctx->bo_list, base.head) {
struct vmw_buffer_object *vbo =
container_of(entry->base.bo, typeof(*vbo), base);
if (entry->cpu_blit) {
struct ttm_operation_ctx ctx = {
.interruptible = intr,
@ -595,27 +576,6 @@ int vmw_validation_bo_validate(struct vmw_validation_context *ctx, bool intr)
}
if (ret)
return ret;
/*
* Rather than having the resource code allocating the bo
* dirty tracker in resource_unreserve() where we can't fail,
* Do it here when validating the buffer object.
*/
if (entry->coherent_count) {
unsigned int coherent_count = entry->coherent_count;
while (coherent_count) {
ret = vmw_bo_dirty_add(vbo);
if (ret)
return ret;
coherent_count--;
}
entry->coherent_count -= coherent_count;
}
if (vbo->dirty)
vmw_bo_dirty_scan(vbo);
}
return 0;
}
@ -641,8 +601,7 @@ int vmw_validation_res_validate(struct vmw_validation_context *ctx, bool intr)
struct vmw_resource *res = val->res;
struct vmw_buffer_object *backup = res->backup;
ret = vmw_resource_validate(res, intr, val->dirty_set &&
val->dirty);
ret = vmw_resource_validate(res, intr);
if (ret) {
if (ret != -ERESTARTSYS)
DRM_ERROR("Failed to validate resource.\n");
@ -869,34 +828,3 @@ int vmw_validation_preload_res(struct vmw_validation_context *ctx,
ctx->mem_size_left += size;
return 0;
}
/**
* vmw_validation_bo_backoff - Unreserve buffer objects registered with a
* validation context
* @ctx: The validation context
*
* This function unreserves the buffer objects previously reserved using
* vmw_validation_bo_reserve. It's typically used as part of an error path
*/
void vmw_validation_bo_backoff(struct vmw_validation_context *ctx)
{
struct vmw_validation_bo_node *entry;
/*
* Switching coherent resource backup buffers failed.
* Release corresponding buffer object dirty trackers.
*/
list_for_each_entry(entry, &ctx->bo_list, base.head) {
if (entry->coherent_count) {
unsigned int coherent_count = entry->coherent_count;
struct vmw_buffer_object *vbo =
container_of(entry->base.bo, typeof(*vbo),
base);
while (coherent_count--)
vmw_bo_dirty_release(vbo);
}
}
ttm_eu_backoff_reservation(&ctx->ticket, &ctx->bo_list);
}

16
drivers/gpu/drm/vmwgfx/vmwgfx_validation.h
View File

@ -172,6 +172,20 @@ vmw_validation_bo_reserve(struct vmw_validation_context *ctx,
NULL, true);
}
/**
* vmw_validation_bo_backoff - Unreserve buffer objects registered with a
* validation context
* @ctx: The validation context
*
* This function unreserves the buffer objects previously reserved using
* vmw_validation_bo_reserve. It's typically used as part of an error path
*/
static inline void
vmw_validation_bo_backoff(struct vmw_validation_context *ctx)
{
ttm_eu_backoff_reservation(&ctx->ticket, &ctx->bo_list);
}
/**
* vmw_validation_bo_fence - Unreserve and fence buffer objects registered
* with a validation context
@ -254,6 +268,4 @@ int vmw_validation_preload_res(struct vmw_validation_context *ctx,
unsigned int size);
void vmw_validation_res_set_dirty(struct vmw_validation_context *ctx,
void *val_private, u32 dirty);
void vmw_validation_bo_backoff(struct vmw_validation_context *ctx);
#endif

10
include/drm/ttm/ttm_bo_api.h
View File

@ -768,14 +768,4 @@ int ttm_bo_swapout(struct ttm_bo_global *glob,
struct ttm_operation_ctx *ctx);
void ttm_bo_swapout_all(struct ttm_bo_device *bdev);
int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo);
/* Default number of pre-faulted pages in the TTM fault handler */
#define TTM_BO_VM_NUM_PREFAULT 16
vm_fault_t ttm_bo_vm_reserve(struct ttm_buffer_object *bo,
struct vm_fault *vmf);
vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
pgprot_t prot,
pgoff_t num_prefault);
#endif

6
include/drm/ttm/ttm_bo_driver.h
View File

@ -442,9 +442,6 @@ extern struct ttm_bo_global {
* @driver: Pointer to a struct ttm_bo_driver struct setup by the driver.
* @man: An array of mem_type_managers.
* @vma_manager: Address space manager
* @vm_ops: Pointer to the struct vm_operations_struct used for this
* device's VM operations. The driver may override this before the first
* mmap() call.
* lru_lock: Spinlock that protects the buffer+device lru lists and
* ddestroy lists.
* @dev_mapping: A pointer to the struct address_space representing the
@ -463,7 +460,6 @@ struct ttm_bo_device {
struct ttm_bo_global *glob;
struct ttm_bo_driver *driver;
struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES];
const struct vm_operations_struct *vm_ops;
/*
* Protected by internal locks.
@ -492,8 +488,6 @@ struct ttm_bo_device {
bool no_retry;
};
extern const struct vm_operations_struct ttm_bo_vm_ops;
/**
* struct ttm_lru_bulk_move_pos
*

19
include/linux/mm.h
View File

@ -2686,24 +2686,7 @@ typedef int (*pte_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr,
extern int apply_to_page_range(struct mm_struct *mm, unsigned long address,
unsigned long size, pte_fn_t fn, void *data);
struct pfn_range_apply;
typedef int (*pter_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr,
struct pfn_range_apply *closure);
struct pfn_range_apply {
struct mm_struct *mm;
pter_fn_t ptefn;
unsigned int alloc;
};
extern int apply_to_pfn_range(struct pfn_range_apply *closure,
unsigned long address, unsigned long size);
unsigned long apply_as_wrprotect(struct address_space *mapping,
pgoff_t first_index, pgoff_t nr);
unsigned long apply_as_clean(struct address_space *mapping,
pgoff_t first_index, pgoff_t nr,
pgoff_t bitmap_pgoff,
unsigned long *bitmap,
pgoff_t *start,
pgoff_t *end);
#ifdef CONFIG_PAGE_POISONING
extern bool page_poisoning_enabled(void);
extern void kernel_poison_pages(struct page *page, int numpages, int enable);

4
include/uapi/drm/vmwgfx_drm.h
View File

@ -891,13 +891,11 @@ struct drm_vmw_shader_arg {
* surface.
* @drm_vmw_surface_flag_create_buffer: Create a backup buffer if none is
* given.
* @drm_vmw_surface_flag_coherent: Back surface with coherent memory.
*/
enum drm_vmw_surface_flags {
drm_vmw_surface_flag_shareable = (1 << 0),
drm_vmw_surface_flag_scanout = (1 << 1),
drm_vmw_surface_flag_create_buffer = (1 << 2),
drm_vmw_surface_flag_coherent = (1 << 3),
drm_vmw_surface_flag_create_buffer = (1 << 2)
};
/**

3
mm/Kconfig
View File

@ -765,7 +765,4 @@ config GUP_BENCHMARK
config ARCH_HAS_PTE_SPECIAL
bool
config AS_DIRTY_HELPERS
bool
endmenu

1
mm/Makefile
View File

@ -104,4 +104,3 @@ obj-$(CONFIG_HARDENED_USERCOPY) += usercopy.o
obj-$(CONFIG_PERCPU_STATS) += percpu-stats.o
obj-$(CONFIG_HMM) += hmm.o
obj-$(CONFIG_MEMFD_CREATE) += memfd.o
obj-$(CONFIG_AS_DIRTY_HELPERS) += as_dirty_helpers.o

300
mm/as_dirty_helpers.c
View File

@ -1,300 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/mm.h>
#include <linux/mm_types.h>
#include <linux/hugetlb.h>
#include <linux/bitops.h>
#include <linux/mmu_notifier.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
/**
* struct apply_as - Closure structure for apply_as_range
* @base: struct pfn_range_apply we derive from
* @start: Address of first modified pte
* @end: Address of last modified pte + 1
* @total: Total number of modified ptes
* @vma: Pointer to the struct vm_area_struct we're currently operating on
*/
struct apply_as {
struct pfn_range_apply base;
unsigned long start;
unsigned long end;
unsigned long total;
struct vm_area_struct *vma;
};
/**
* apply_pt_wrprotect - Leaf pte callback to write-protect a pte
* @pte: Pointer to the pte
* @token: Page table token, see apply_to_pfn_range()
* @addr: The virtual page address
* @closure: Pointer to a struct pfn_range_apply embedded in a
* struct apply_as
*
* The function write-protects a pte and records the range in
* virtual address space of touched ptes for efficient range TLB flushes.
*
* Return: Always zero.
*/
static int apply_pt_wrprotect(pte_t *pte, pgtable_t token,
unsigned long addr,
struct pfn_range_apply *closure)
{
struct apply_as *aas = container_of(closure, typeof(*aas), base);
pte_t ptent = *pte;
if (pte_write(ptent)) {
pte_t old_pte = ptep_modify_prot_start(aas->vma, addr, pte);
ptent = pte_wrprotect(old_pte);
ptep_modify_prot_commit(aas->vma, addr, pte, old_pte, ptent);
aas->total++;
aas->start = min(aas->start, addr);
aas->end = max(aas->end, addr + PAGE_SIZE);
}
return 0;
}
/**
* struct apply_as_clean - Closure structure for apply_as_clean
* @base: struct apply_as we derive from
* @bitmap_pgoff: Address_space Page offset of the first bit in @bitmap
* @bitmap: Bitmap with one bit for each page offset in the address_space range
* covered.
* @start: Address_space page offset of first modified pte relative
* to @bitmap_pgoff
* @end: Address_space page offset of last modified pte relative
* to @bitmap_pgoff
*/
struct apply_as_clean {
struct apply_as base;
pgoff_t bitmap_pgoff;
unsigned long *bitmap;
pgoff_t start;
pgoff_t end;
};
/**
* apply_pt_clean - Leaf pte callback to clean a pte
* @pte: Pointer to the pte
* @token: Page table token, see apply_to_pfn_range()
* @addr: The virtual page address
* @closure: Pointer to a struct pfn_range_apply embedded in a
* struct apply_as_clean
*
* The function cleans a pte and records the range in
* virtual address space of touched ptes for efficient TLB flushes.
* It also records dirty ptes in a bitmap representing page offsets
* in the address_space, as well as the first and last of the bits
* touched.
*
* Return: Always zero.
*/
static int apply_pt_clean(pte_t *pte, pgtable_t token,
unsigned long addr,
struct pfn_range_apply *closure)
{
struct apply_as *aas = container_of(closure, typeof(*aas), base);
struct apply_as_clean *clean = container_of(aas, typeof(*clean), base);
pte_t ptent = *pte;
if (pte_dirty(ptent)) {
pgoff_t pgoff = ((addr - aas->vma->vm_start) >> PAGE_SHIFT) +
aas->vma->vm_pgoff - clean->bitmap_pgoff;
pte_t old_pte = ptep_modify_prot_start(aas->vma, addr, pte);
ptent = pte_mkclean(old_pte);
ptep_modify_prot_commit(aas->vma, addr, pte, old_pte, ptent);
aas->total++;
aas->start = min(aas->start, addr);
aas->end = max(aas->end, addr + PAGE_SIZE);
__set_bit(pgoff, clean->bitmap);
clean->start = min(clean->start, pgoff);
clean->end = max(clean->end, pgoff + 1);
}
return 0;
}
/**
* apply_as_range - Apply a pte callback to all PTEs pointing into a range
* of an address_space.
* @mapping: Pointer to the struct address_space
* @aas: Closure structure
* @first_index: First page offset in the address_space
* @nr: Number of incremental page offsets to cover
*
* Return: Number of ptes touched. Note that this number might be larger
* than @nr if there are overlapping vmas
*/
static unsigned long apply_as_range(struct address_space *mapping,
struct apply_as *aas,
pgoff_t first_index, pgoff_t nr)
{
struct vm_area_struct *vma;
pgoff_t vba, vea, cba, cea;
unsigned long start_addr, end_addr;
struct mmu_notifier_range range;
i_mmap_lock_read(mapping);
vma_interval_tree_foreach(vma, &mapping->i_mmap, first_index,
first_index + nr - 1) {
unsigned long vm_flags = READ_ONCE(vma->vm_flags);
/*
* We can only do advisory flag tests below, since we can't
* require the vm's mmap_sem to be held to protect the flags.
* Therefore, callers that strictly depend on specific mmap
* flags to remain constant throughout the operation must
* either ensure those flags are immutable for all relevant
* vmas or can't use this function. Fixing this properly would
* require the vma::vm_flags to be protected by a separate
* lock taken after the i_mmap_lock
*/
/* Skip non-applicable VMAs */
if ((vm_flags & (VM_SHARED | VM_WRITE)) !=
(VM_SHARED | VM_WRITE))
continue;
/* Warn on and skip VMAs whose flags indicate illegal usage */
if (WARN_ON((vm_flags & (VM_HUGETLB | VM_IO)) != VM_IO))
continue;
/* Clip to the vma */
vba = vma->vm_pgoff;
vea = vba + vma_pages(vma);
cba = first_index;
cba = max(cba, vba);
cea = first_index + nr;
cea = min(cea, vea);
/* Translate to virtual address */
start_addr = ((cba - vba) << PAGE_SHIFT) + vma->vm_start;
end_addr = ((cea - vba) << PAGE_SHIFT) + vma->vm_start;
if (start_addr >= end_addr)
continue;
aas->base.mm = vma->vm_mm;
aas->vma = vma;
aas->start = end_addr;
aas->end = start_addr;
mmu_notifier_range_init(&range, MMU_NOTIFY_PROTECTION_PAGE, 0,
vma, vma->vm_mm, start_addr, end_addr);
mmu_notifier_invalidate_range_start(&range);
/* Needed when we only change protection? */
flush_cache_range(vma, start_addr, end_addr);
/*
* We're not using tlb_gather_mmu() since typically
* only a small subrange of PTEs are affected.
*/
inc_tlb_flush_pending(vma->vm_mm);
/* Should not error since aas->base.alloc == 0 */
WARN_ON(apply_to_pfn_range(&aas->base, start_addr,
end_addr - start_addr));
if (aas->end > aas->start)
flush_tlb_range(vma, aas->start, aas->end);
mmu_notifier_invalidate_range_end(&range);
dec_tlb_flush_pending(vma->vm_mm);
}
i_mmap_unlock_read(mapping);
return aas->total;
}
/**
* apply_as_wrprotect - Write-protect all ptes in an address_space range
* @mapping: The address_space we want to write protect
* @first_index: The first page offset in the range
* @nr: Number of incremental page offsets to cover
*
* WARNING: This function should only be used for address spaces whose
* vmas are marked VM_IO and that do not contain huge pages.
* To avoid interference with COW'd pages, vmas not marked VM_SHARED are
* simply skipped.
*
* Return: The number of ptes actually write-protected. Note that
* already write-protected ptes are not counted.
*/
unsigned long apply_as_wrprotect(struct address_space *mapping,
pgoff_t first_index, pgoff_t nr)
{
struct apply_as aas = {
.base = {
.alloc = 0,
.ptefn = apply_pt_wrprotect,
},
.total = 0,
};
return apply_as_range(mapping, &aas, first_index, nr);
}
EXPORT_SYMBOL_GPL(apply_as_wrprotect);
/**
* apply_as_clean - Clean all ptes in an address_space range
* @mapping: The address_space we want to clean
* @first_index: The first page offset in the range
* @nr: Number of incremental page offsets to cover
* @bitmap_pgoff: The page offset of the first bit in @bitmap
* @bitmap: Pointer to a bitmap of at least @nr bits. The bitmap needs to
* cover the whole range @first_index..@first_index + @nr.
* @start: Pointer to number of the first set bit in @bitmap.
* is modified as new bits are set by the function.
* @end: Pointer to the number of the last set bit in @bitmap.
* none set. The value is modified as new bits are set by the function.
*
* Note: When this function returns there is no guarantee that a CPU has
* not already dirtied new ptes. However it will not clean any ptes not
* reported in the bitmap.
*
* If a caller needs to make sure all dirty ptes are picked up and none
* additional are added, it first needs to write-protect the address-space
* range and make sure new writers are blocked in page_mkwrite() or
* pfn_mkwrite(). And then after a TLB flush following the write-protection
* pick up all dirty bits.
*
* WARNING: This function should only be used for address spaces whose
* vmas are marked VM_IO and that do not contain huge pages.
* To avoid interference with COW'd pages, vmas not marked VM_SHARED are
* simply skipped.
*
* Return: The number of dirty ptes actually cleaned.
*/
unsigned long apply_as_clean(struct address_space *mapping,
pgoff_t first_index, pgoff_t nr,
pgoff_t bitmap_pgoff,
unsigned long *bitmap,
pgoff_t *start,
pgoff_t *end)
{
bool none_set = (*start >= *end);
struct apply_as_clean clean = {
.base = {
.base = {
.alloc = 0,
.ptefn = apply_pt_clean,
},
.total = 0,
},
.bitmap_pgoff = bitmap_pgoff,
.bitmap = bitmap,
.start = none_set ? nr : *start,
.end = none_set ? 0 : *end,
};
unsigned long ret = apply_as_range(mapping, &clean.base, first_index,
nr);
*start = clean.start;
*end = clean.end;
return ret;
}
EXPORT_SYMBOL_GPL(apply_as_clean);

145
mm/memory.c
View File

@ -2032,17 +2032,18 @@ int vm_iomap_memory(struct vm_area_struct *vma, phys_addr_t start, unsigned long
}
EXPORT_SYMBOL(vm_iomap_memory);
static int apply_to_pte_range(struct pfn_range_apply *closure, pmd_t *pmd,
unsigned long addr, unsigned long end)
static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd,
unsigned long addr, unsigned long end,
pte_fn_t fn, void *data)
{
pte_t *pte;
int err;
pgtable_t token;
spinlock_t *uninitialized_var(ptl);
pte = (closure->mm == &init_mm) ?
pte = (mm == &init_mm) ?
pte_alloc_kernel(pmd, addr) :
pte_alloc_map_lock(closure->mm, pmd, addr, &ptl);
pte_alloc_map_lock(mm, pmd, addr, &ptl);
if (!pte)
return -ENOMEM;
@ -2053,109 +2054,86 @@ static int apply_to_pte_range(struct pfn_range_apply *closure, pmd_t *pmd,
token = pmd_pgtable(*pmd);
do {
err = closure->ptefn(pte++, token, addr, closure);
err = fn(pte++, token, addr, data);
if (err)
break;
} while (addr += PAGE_SIZE, addr != end);
arch_leave_lazy_mmu_mode();
if (closure->mm != &init_mm)
if (mm != &init_mm)
pte_unmap_unlock(pte-1, ptl);
return err;
}
static int apply_to_pmd_range(struct pfn_range_apply *closure, pud_t *pud,
unsigned long addr, unsigned long end)
static int apply_to_pmd_range(struct mm_struct *mm, pud_t *pud,
unsigned long addr, unsigned long end,
pte_fn_t fn, void *data)
{
pmd_t *pmd;
unsigned long next;
int err = 0;
int err;
BUG_ON(pud_huge(*pud));
pmd = pmd_alloc(closure->mm, pud, addr);
pmd = pmd_alloc(mm, pud, addr);
if (!pmd)
return -ENOMEM;
do {
next = pmd_addr_end(addr, end);
if (!closure->alloc && pmd_none_or_clear_bad(pmd))
continue;
err = apply_to_pte_range(closure, pmd, addr, next);
err = apply_to_pte_range(mm, pmd, addr, next, fn, data);
if (err)
break;
} while (pmd++, addr = next, addr != end);
return err;
}
static int apply_to_pud_range(struct pfn_range_apply *closure, p4d_t *p4d,
unsigned long addr, unsigned long end)
static int apply_to_pud_range(struct mm_struct *mm, p4d_t *p4d,
unsigned long addr, unsigned long end,
pte_fn_t fn, void *data)
{
pud_t *pud;
unsigned long next;
int err = 0;
int err;
pud = pud_alloc(closure->mm, p4d, addr);
pud = pud_alloc(mm, p4d, addr);
if (!pud)
return -ENOMEM;
do {
next = pud_addr_end(addr, end);
if (!closure->alloc && pud_none_or_clear_bad(pud))
continue;
err = apply_to_pmd_range(closure, pud, addr, next);
err = apply_to_pmd_range(mm, pud, addr, next, fn, data);
if (err)
break;
} while (pud++, addr = next, addr != end);
return err;
}
static int apply_to_p4d_range(struct pfn_range_apply *closure, pgd_t *pgd,
unsigned long addr, unsigned long end)
static int apply_to_p4d_range(struct mm_struct *mm, pgd_t *pgd,
unsigned long addr, unsigned long end,
pte_fn_t fn, void *data)
{
p4d_t *p4d;
unsigned long next;
int err = 0;
int err;
p4d = p4d_alloc(closure->mm, pgd, addr);
p4d = p4d_alloc(mm, pgd, addr);
if (!p4d)
return -ENOMEM;
do {
next = p4d_addr_end(addr, end);
if (!closure->alloc && p4d_none_or_clear_bad(p4d))
continue;
err = apply_to_pud_range(closure, p4d, addr, next);
err = apply_to_pud_range(mm, p4d, addr, next, fn, data);
if (err)
break;
} while (p4d++, addr = next, addr != end);
return err;
}
/**
* apply_to_pfn_range - Scan a region of virtual memory, calling a provided
* function on each leaf page table entry
* @closure: Details about how to scan and what function to apply
* @addr: Start virtual address
* @size: Size of the region
*
* If @closure->alloc is set to 1, the function will fill in the page table
* as necessary. Otherwise it will skip non-present parts.
* Note: The caller must ensure that the range does not contain huge pages.
* The caller must also assure that the proper mmu_notifier functions are
* called before and after the call to apply_to_pfn_range.
*
* WARNING: Do not use this function unless you know exactly what you are
* doing. It is lacking support for huge pages and transparent huge pages.
*
* Return: Zero on success. If the provided function returns a non-zero status,
* the page table walk will terminate and that status will be returned.
* If @closure->alloc is set to 1, then this function may also return memory
* allocation errors arising from allocating page table memory.
/*
* Scan a region of virtual memory, filling in page tables as necessary
* and calling a provided function on each leaf page table.
*/
int apply_to_pfn_range(struct pfn_range_apply *closure,
unsigned long addr, unsigned long size)
int apply_to_page_range(struct mm_struct *mm, unsigned long addr,
unsigned long size, pte_fn_t fn, void *data)
{
pgd_t *pgd;
unsigned long next;
@ -2165,65 +2143,16 @@ int apply_to_pfn_range(struct pfn_range_apply *closure,
if (WARN_ON(addr >= end))
return -EINVAL;
pgd = pgd_offset(closure->mm, addr);
pgd = pgd_offset(mm, addr);
do {
next = pgd_addr_end(addr, end);
if (!closure->alloc && pgd_none_or_clear_bad(pgd))
continue;
err = apply_to_p4d_range(closure, pgd, addr, next);
err = apply_to_p4d_range(mm, pgd, addr, next, fn, data);
if (err)
break;
} while (pgd++, addr = next, addr != end);
return err;
}
/**
* struct page_range_apply - Closure structure for apply_to_page_range()
* @pter: The base closure structure we derive from
* @fn: The leaf pte function to call
* @data: The leaf pte function closure
*/
struct page_range_apply {
struct pfn_range_apply pter;
pte_fn_t fn;
void *data;
};
/*
* Callback wrapper to enable use of apply_to_pfn_range for
* the apply_to_page_range interface
*/
static int apply_to_page_range_wrapper(pte_t *pte, pgtable_t token,
unsigned long addr,
struct pfn_range_apply *pter)
{
struct page_range_apply *pra =
container_of(pter, typeof(*pra), pter);
return pra->fn(pte, token, addr, pra->data);
}
/*
* Scan a region of virtual memory, filling in page tables as necessary
* and calling a provided function on each leaf page table.
*
* WARNING: Do not use this function unless you know exactly what you are
* doing. It is lacking support for huge pages and transparent huge pages.
*/
int apply_to_page_range(struct mm_struct *mm, unsigned long addr,
unsigned long size, pte_fn_t fn, void *data)
{
struct page_range_apply pra = {
.pter = {.mm = mm,
.alloc = 1,
.ptefn = apply_to_page_range_wrapper },
.fn = fn,
.data = data
};
return apply_to_pfn_range(&pra.pter, addr, size);
}
EXPORT_SYMBOL_GPL(apply_to_page_range);
/*
@ -2309,7 +2238,7 @@ static vm_fault_t do_page_mkwrite(struct vm_fault *vmf)
ret = vmf->vma->vm_ops->page_mkwrite(vmf);
/* Restore original flags so that caller is not surprised */
vmf->flags = old_flags;
if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE | VM_FAULT_RETRY)))
if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE)))
return ret;
if (unlikely(!(ret & VM_FAULT_LOCKED))) {
lock_page(page);
@ -2586,7 +2515,7 @@ static vm_fault_t wp_pfn_shared(struct vm_fault *vmf)
pte_unmap_unlock(vmf->pte, vmf->ptl);
vmf->flags |= FAULT_FLAG_MKWRITE;
ret = vma->vm_ops->pfn_mkwrite(vmf);
if (ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE | VM_FAULT_RETRY))
if (ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE))
return ret;
return finish_mkwrite_fault(vmf);
}
@ -2607,8 +2536,7 @@ static vm_fault_t wp_page_shared(struct vm_fault *vmf)
pte_unmap_unlock(vmf->pte, vmf->ptl);
tmp = do_page_mkwrite(vmf);
if (unlikely(!tmp || (tmp &
(VM_FAULT_ERROR | VM_FAULT_NOPAGE |
VM_FAULT_RETRY)))) {
(VM_FAULT_ERROR | VM_FAULT_NOPAGE)))) {
put_page(vmf->page);
return tmp;
}
@ -3673,8 +3601,7 @@ static vm_fault_t do_shared_fault(struct vm_fault *vmf)
unlock_page(vmf->page);
tmp = do_page_mkwrite(vmf);
if (unlikely(!tmp ||
(tmp & (VM_FAULT_ERROR | VM_FAULT_NOPAGE |
VM_FAULT_RETRY)))) {
(tmp & (VM_FAULT_ERROR | VM_FAULT_NOPAGE)))) {
put_page(vmf->page);
return tmp;
}