From 1543e317f1da31b75942316931e8f491a8920811 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 04 Jan 2024 10:08:02 +0000
Subject: [PATCH] disable FB
---
kernel/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c | 412 +++++++++++++++++++++++++++++++++++++++++++---------------
1 files changed, 306 insertions(+), 106 deletions(-)
diff --git a/kernel/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/kernel/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
index 92003ea..c0f1560 100644
--- a/kernel/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
+++ b/kernel/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
@@ -25,14 +25,57 @@
*
**************************************************************************/
-#include "vmwgfx_drv.h"
-#include <drm/vmwgfx_drm.h>
#include <drm/ttm/ttm_placement.h>
-#include <drm/drmP.h>
+
#include "vmwgfx_resource_priv.h"
#include "vmwgfx_binding.h"
+#include "vmwgfx_drv.h"
#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;
+
+ dma_resv_assert_held(res->backup->base.base.resv);
+ 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;
+
+ dma_resv_assert_held(backup->base.base.resv);
+ 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)
{
@@ -58,11 +101,11 @@
struct vmw_private *dev_priv = res->dev_priv;
struct idr *idr = &dev_priv->res_idr[res->func->res_type];
- write_lock(&dev_priv->resource_lock);
+ spin_lock(&dev_priv->resource_lock);
if (res->id != -1)
idr_remove(idr, res->id);
res->id = -1;
- write_unlock(&dev_priv->resource_lock);
+ spin_unlock(&dev_priv->resource_lock);
}
static void vmw_resource_release(struct kref *kref)
@@ -73,24 +116,27 @@
int id;
struct idr *idr = &dev_priv->res_idr[res->func->res_type];
- write_lock(&dev_priv->resource_lock);
- res->avail = false;
+ spin_lock(&dev_priv->resource_lock);
list_del_init(&res->lru_head);
- write_unlock(&dev_priv->resource_lock);
+ spin_unlock(&dev_priv->resource_lock);
if (res->backup) {
struct ttm_buffer_object *bo = &res->backup->base;
ttm_bo_reserve(bo, false, false, NULL);
- if (!list_empty(&res->mob_head) &&
+ if (vmw_resource_mob_attached(res) &&
res->func->unbind != NULL) {
struct ttm_validate_buffer val_buf;
val_buf.bo = bo;
- val_buf.shared = false;
+ val_buf.num_shared = 0;
res->func->unbind(res, false, &val_buf);
}
res->backup_dirty = false;
- list_del_init(&res->mob_head);
+ vmw_resource_mob_detach(res);
+ if (res->dirty)
+ res->func->dirty_free(res);
+ if (res->coherent)
+ vmw_bo_dirty_release(res->backup);
ttm_bo_unreserve(bo);
vmw_bo_unreference(&res->backup);
}
@@ -108,10 +154,10 @@
else
kfree(res);
- write_lock(&dev_priv->resource_lock);
+ spin_lock(&dev_priv->resource_lock);
if (id != -1)
idr_remove(idr, id);
- write_unlock(&dev_priv->resource_lock);
+ spin_unlock(&dev_priv->resource_lock);
}
void vmw_resource_unreference(struct vmw_resource **p_res)
@@ -140,13 +186,13 @@
BUG_ON(res->id != -1);
idr_preload(GFP_KERNEL);
- write_lock(&dev_priv->resource_lock);
+ spin_lock(&dev_priv->resource_lock);
ret = idr_alloc(idr, res, 1, 0, GFP_NOWAIT);
if (ret >= 0)
res->id = ret;
- write_unlock(&dev_priv->resource_lock);
+ spin_unlock(&dev_priv->resource_lock);
idr_preload_end();
return ret < 0 ? ret : 0;
}
@@ -170,45 +216,25 @@
kref_init(&res->kref);
res->hw_destroy = NULL;
res->res_free = res_free;
- res->avail = false;
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
return vmw_resource_alloc_id(res);
}
-/**
- * vmw_resource_activate
- *
- * @res: Pointer to the newly created resource
- * @hw_destroy: Destroy function. NULL if none.
- *
- * Activate a resource after the hardware has been made aware of it.
- * Set tye destroy function to @destroy. Typically this frees the
- * resource and destroys the hardware resources associated with it.
- * Activate basically means that the function vmw_resource_lookup will
- * find it.
- */
-void vmw_resource_activate(struct vmw_resource *res,
- void (*hw_destroy) (struct vmw_resource *))
-{
- struct vmw_private *dev_priv = res->dev_priv;
-
- write_lock(&dev_priv->resource_lock);
- res->avail = true;
- res->hw_destroy = hw_destroy;
- write_unlock(&dev_priv->resource_lock);
-}
/**
* vmw_user_resource_lookup_handle - lookup a struct resource from a
@@ -243,15 +269,7 @@
goto out_bad_resource;
res = converter->base_obj_to_res(base);
-
- read_lock(&dev_priv->resource_lock);
- if (!res->avail || res->res_free != converter->res_free) {
- read_unlock(&dev_priv->resource_lock);
- goto out_bad_resource;
- }
-
kref_get(&res->kref);
- read_unlock(&dev_priv->resource_lock);
*p_res = res;
ret = 0;
@@ -260,6 +278,41 @@
ttm_base_object_unref(&base);
return ret;
+}
+
+/**
+ * vmw_user_resource_lookup_handle - lookup a struct resource from a
+ * TTM user-space handle and perform basic type checks
+ *
+ * @dev_priv: Pointer to a device private struct
+ * @tfile: Pointer to a struct ttm_object_file identifying the caller
+ * @handle: The TTM user-space handle
+ * @converter: Pointer to an object describing the resource type
+ * @p_res: On successful return the location pointed to will contain
+ * a pointer to a refcounted struct vmw_resource.
+ *
+ * If the handle can't be found or is associated with an incorrect resource
+ * type, -EINVAL will be returned.
+ */
+struct vmw_resource *
+vmw_user_resource_noref_lookup_handle(struct vmw_private *dev_priv,
+ struct ttm_object_file *tfile,
+ uint32_t handle,
+ const struct vmw_user_resource_conv
+ *converter)
+{
+ struct ttm_base_object *base;
+
+ base = ttm_base_object_noref_lookup(tfile, handle);
+ if (!base)
+ return ERR_PTR(-ESRCH);
+
+ if (unlikely(ttm_base_object_type(base) != converter->object_type)) {
+ ttm_base_object_noref_release();
+ return ERR_PTR(-EINVAL);
+ }
+
+ return converter->base_obj_to_res(base);
}
/**
@@ -340,7 +393,8 @@
* 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)
+ struct ttm_validate_buffer *val_buf,
+ bool dirtying)
{
int ret = 0;
const struct vmw_res_func *func = res->func;
@@ -352,23 +406,48 @@
}
if (func->bind &&
- ((func->needs_backup && list_empty(&res->mob_head) &&
+ ((func->needs_backup && !vmw_resource_mob_attached(res) &&
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)
- list_add_tail(&res->mob_head, &res->backup->res_list);
+ vmw_resource_mob_attach(res);
}
/*
- * Only do this on write operations, and move to
- * vmw_resource_unreserve if it can be called after
- * backup buffers have been unreserved. Otherwise
- * sort out locking.
+ * Handle the case where the backup mob is marked coherent but
+ * the resource isn't.
*/
- res->res_dirty = true;
+ 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);
+ }
return 0;
@@ -383,6 +462,8 @@
* command submission.
*
* @res: Pointer to the struct vmw_resource to unreserve.
+ * @dirty_set: Change dirty status of the resource.
+ * @dirty: When changing dirty status indicates the new status.
* @switch_backup: Backup buffer has been switched.
* @new_backup: Pointer to new backup buffer if command submission
* switched. May be NULL.
@@ -392,6 +473,8 @@
* resource lru list, so that it can be evicted if necessary.
*/
void vmw_resource_unreserve(struct vmw_resource *res,
+ bool dirty_set,
+ bool dirty,
bool switch_backup,
struct vmw_buffer_object *new_backup,
unsigned long new_backup_offset)
@@ -403,29 +486,42 @@
if (switch_backup && new_backup != res->backup) {
if (res->backup) {
- lockdep_assert_held(&res->backup->base.resv->lock.base);
- list_del_init(&res->mob_head);
+ vmw_resource_mob_detach(res);
+ if (res->coherent)
+ vmw_bo_dirty_release(res->backup);
vmw_bo_unreference(&res->backup);
}
if (new_backup) {
res->backup = vmw_bo_reference(new_backup);
- lockdep_assert_held(&new_backup->base.resv->lock.base);
- list_add_tail(&res->mob_head, &new_backup->res_list);
+
+ /*
+ * The validation code should already have added a
+ * dirty tracker here.
+ */
+ WARN_ON(res->coherent && !new_backup->dirty);
+
+ vmw_resource_mob_attach(res);
} 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;
+
+ if (dirty_set)
+ res->res_dirty = dirty;
if (!res->func->may_evict || res->id == -1 || res->pin_count)
return;
- write_lock(&dev_priv->resource_lock);
+ spin_lock(&dev_priv->resource_lock);
list_add_tail(&res->lru_head,
&res->dev_priv->res_lru[res->func->res_type]);
- write_unlock(&dev_priv->resource_lock);
+ spin_unlock(&dev_priv->resource_lock);
}
/**
@@ -458,14 +554,15 @@
}
INIT_LIST_HEAD(&val_list);
- val_buf->bo = ttm_bo_reference(&res->backup->base);
- val_buf->shared = false;
+ ttm_bo_get(&res->backup->base);
+ val_buf->bo = &res->backup->base;
+ val_buf->num_shared = 0;
list_add_tail(&val_buf->head, &val_list);
ret = ttm_eu_reserve_buffers(ticket, &val_list, interruptible, NULL);
if (unlikely(ret != 0))
goto out_no_reserve;
- if (res->func->needs_backup && list_empty(&res->mob_head))
+ if (res->func->needs_backup && !vmw_resource_mob_attached(res))
return 0;
backup_dirty = res->backup_dirty;
@@ -481,7 +578,8 @@
out_no_validate:
ttm_eu_backoff_reservation(ticket, &val_list);
out_no_reserve:
- ttm_bo_unref(&val_buf->bo);
+ ttm_bo_put(val_buf->bo);
+ val_buf->bo = NULL;
if (backup_dirty)
vmw_bo_unreference(&res->backup);
@@ -504,9 +602,9 @@
struct vmw_private *dev_priv = res->dev_priv;
int ret;
- write_lock(&dev_priv->resource_lock);
+ spin_lock(&dev_priv->resource_lock);
list_del_init(&res->lru_head);
- write_unlock(&dev_priv->resource_lock);
+ spin_unlock(&dev_priv->resource_lock);
if (res->func->needs_backup && res->backup == NULL &&
!no_backup) {
@@ -541,7 +639,8 @@
INIT_LIST_HEAD(&val_list);
list_add_tail(&val_buf->head, &val_list);
ttm_eu_backoff_reservation(ticket, &val_list);
- ttm_bo_unref(&val_buf->bo);
+ ttm_bo_put(val_buf->bo);
+ val_buf->bo = NULL;
}
/**
@@ -562,17 +661,17 @@
BUG_ON(!func->may_evict);
val_buf.bo = NULL;
- val_buf.shared = false;
+ val_buf.num_shared = 0;
ret = vmw_resource_check_buffer(ticket, res, interruptible, &val_buf);
if (unlikely(ret != 0))
return ret;
if (unlikely(func->unbind != NULL &&
- (!func->needs_backup || !list_empty(&res->mob_head)))) {
+ (!func->needs_backup || vmw_resource_mob_attached(res)))) {
ret = func->unbind(res, res->res_dirty, &val_buf);
if (unlikely(ret != 0))
goto out_no_unbind;
- list_del_init(&res->mob_head);
+ vmw_resource_mob_detach(res);
}
ret = func->destroy(res);
res->backup_dirty = true;
@@ -587,15 +686,20 @@
/**
* vmw_resource_validate - Make a resource up-to-date and visible
* to the device.
- *
- * @res: The resource to make visible 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.
* On hardware resource shortage, this function will repeatedly evict
* resources of the same type until the validation succeeds.
+ *
+ * Return: Zero on success, -ERESTARTSYS if interrupted, negative error code
+ * on failure.
*/
-int vmw_resource_validate(struct vmw_resource *res)
+int vmw_resource_validate(struct vmw_resource *res, bool intr,
+ bool dirtying)
{
int ret;
struct vmw_resource *evict_res;
@@ -608,20 +712,20 @@
return 0;
val_buf.bo = NULL;
- val_buf.shared = false;
+ val_buf.num_shared = 0;
if (res->backup)
val_buf.bo = &res->backup->base;
do {
- ret = vmw_resource_do_validate(res, &val_buf);
+ ret = vmw_resource_do_validate(res, &val_buf, dirtying);
if (likely(ret != -EBUSY))
break;
- write_lock(&dev_priv->resource_lock);
+ spin_lock(&dev_priv->resource_lock);
if (list_empty(lru_list) || !res->func->may_evict) {
DRM_ERROR("Out of device device resources "
"for %s.\n", res->func->type_name);
ret = -EBUSY;
- write_unlock(&dev_priv->resource_lock);
+ spin_unlock(&dev_priv->resource_lock);
break;
}
@@ -630,14 +734,14 @@
lru_head));
list_del_init(&evict_res->lru_head);
- write_unlock(&dev_priv->resource_lock);
+ spin_unlock(&dev_priv->resource_lock);
/* Trylock backup buffers with a NULL ticket. */
- ret = vmw_resource_do_evict(NULL, evict_res, true);
+ ret = vmw_resource_do_evict(NULL, evict_res, intr);
if (unlikely(ret != 0)) {
- write_lock(&dev_priv->resource_lock);
+ spin_lock(&dev_priv->resource_lock);
list_add_tail(&evict_res->lru_head, lru_list);
- write_unlock(&dev_priv->resource_lock);
+ spin_unlock(&dev_priv->resource_lock);
if (ret == -ERESTARTSYS ||
++err_count > VMW_RES_EVICT_ERR_COUNT) {
vmw_resource_unreference(&evict_res);
@@ -651,7 +755,7 @@
if (unlikely(ret != 0))
goto out_no_validate;
else if (!res->func->needs_backup && res->backup) {
- list_del_init(&res->mob_head);
+ WARN_ON_ONCE(vmw_resource_mob_attached(res));
vmw_bo_unreference(&res->backup);
}
@@ -675,22 +779,23 @@
*/
void vmw_resource_unbind_list(struct vmw_buffer_object *vbo)
{
-
- struct vmw_resource *res, *next;
struct ttm_validate_buffer val_buf = {
.bo = &vbo->base,
- .shared = false
+ .num_shared = 0
};
- lockdep_assert_held(&vbo->base.resv->lock.base);
- list_for_each_entry_safe(res, next, &vbo->res_list, mob_head) {
- if (!res->func->unbind)
- continue;
+ dma_resv_assert_held(vbo->base.base.resv);
+ 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);
- (void) res->func->unbind(res, true, &val_buf);
+ if (!WARN_ON_ONCE(!res->func->unbind))
+ (void) res->func->unbind(res, res->res_dirty, &val_buf);
+
res->backup_dirty = true;
res->res_dirty = false;
- list_del_init(&res->mob_head);
+ vmw_resource_mob_detach(res);
}
(void) ttm_bo_wait(&vbo->base, false, false);
@@ -722,12 +827,9 @@
dx_query_ctx = dx_query_mob->dx_query_ctx;
dev_priv = dx_query_ctx->dev_priv;
- cmd = vmw_fifo_reserve_dx(dev_priv, sizeof(*cmd), dx_query_ctx->id);
- if (unlikely(cmd == NULL)) {
- DRM_ERROR("Failed reserving FIFO space for "
- "query MOB read back.\n");
+ cmd = VMW_FIFO_RESERVE_DX(dev_priv, sizeof(*cmd), dx_query_ctx->id);
+ if (unlikely(cmd == NULL))
return -ENOMEM;
- }
cmd->header.id = SVGA_3D_CMD_DX_READBACK_ALL_QUERY;
cmd->header.size = sizeof(cmd->body);
@@ -753,7 +855,7 @@
* states from the device.
*/
void vmw_query_move_notify(struct ttm_buffer_object *bo,
- struct ttm_mem_reg *mem)
+ struct ttm_resource *mem)
{
struct vmw_buffer_object *dx_query_mob;
struct ttm_bo_device *bdev = bo->bdev;
@@ -819,7 +921,7 @@
struct ww_acquire_ctx ticket;
do {
- write_lock(&dev_priv->resource_lock);
+ spin_lock(&dev_priv->resource_lock);
if (list_empty(lru_list))
goto out_unlock;
@@ -828,14 +930,14 @@
list_first_entry(lru_list, struct vmw_resource,
lru_head));
list_del_init(&evict_res->lru_head);
- write_unlock(&dev_priv->resource_lock);
+ spin_unlock(&dev_priv->resource_lock);
/* Wait lock backup buffers with a ticket. */
ret = vmw_resource_do_evict(&ticket, evict_res, false);
if (unlikely(ret != 0)) {
- write_lock(&dev_priv->resource_lock);
+ spin_lock(&dev_priv->resource_lock);
list_add_tail(&evict_res->lru_head, lru_list);
- write_unlock(&dev_priv->resource_lock);
+ spin_unlock(&dev_priv->resource_lock);
if (++err_count > VMW_RES_EVICT_ERR_COUNT) {
vmw_resource_unreference(&evict_res);
return;
@@ -846,7 +948,7 @@
} while (1);
out_unlock:
- write_unlock(&dev_priv->resource_lock);
+ spin_unlock(&dev_priv->resource_lock);
}
/**
@@ -914,7 +1016,7 @@
/* Do we really need to pin the MOB as well? */
vmw_bo_pin_reserved(vbo, true);
}
- ret = vmw_resource_validate(res);
+ ret = vmw_resource_validate(res, interruptible, true);
if (vbo)
ttm_bo_unreserve(&vbo->base);
if (ret)
@@ -923,7 +1025,7 @@
res->pin_count++;
out_no_validate:
- vmw_resource_unreserve(res, false, NULL, 0UL);
+ vmw_resource_unreserve(res, false, false, false, NULL, 0UL);
out_no_reserve:
mutex_unlock(&dev_priv->cmdbuf_mutex);
ttm_write_unlock(&dev_priv->reservation_sem);
@@ -959,7 +1061,7 @@
ttm_bo_unreserve(&vbo->base);
}
- vmw_resource_unreserve(res, false, NULL, 0UL);
+ vmw_resource_unreserve(res, false, false, false, NULL, 0UL);
mutex_unlock(&dev_priv->cmdbuf_mutex);
ttm_read_unlock(&dev_priv->reservation_sem);
@@ -974,3 +1076,101 @@
{
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
+ (dma_resv_get_excl(bo->base.resv));
+ }
+
+ return 0;
+}
--
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