ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/marvell/linux/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
new file mode 100644
index 0000000..5581a78
--- /dev/null
+++ b/marvell/linux/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
@@ -0,0 +1,1010 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/**************************************************************************
+ *
+ * Copyright 2009-2015 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 <drm/ttm/ttm_placement.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;
+
+ dma_resv_assert_held(res->backup->base.base.resv);
+ res->used_prio = (res->res_dirty) ? res->func->dirty_prio :
+ res->func->prio;
+ list_add_tail(&res->mob_head, &backup->res_list);
+ 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)) {
+ list_del_init(&res->mob_head);
+ vmw_bo_prio_del(backup, res->used_prio);
+ }
+}
+
+struct vmw_resource *vmw_resource_reference(struct vmw_resource *res)
+{
+ kref_get(&res->kref);
+ return res;
+}
+
+struct vmw_resource *
+vmw_resource_reference_unless_doomed(struct vmw_resource *res)
+{
+ return kref_get_unless_zero(&res->kref) ? res : NULL;
+}
+
+/**
+ * vmw_resource_release_id - release a resource id to the id manager.
+ *
+ * @res: Pointer to the resource.
+ *
+ * Release the resource id to the resource id manager and set it to -1
+ */
+void vmw_resource_release_id(struct vmw_resource *res)
+{
+ struct vmw_private *dev_priv = res->dev_priv;
+ struct idr *idr = &dev_priv->res_idr[res->func->res_type];
+
+ spin_lock(&dev_priv->resource_lock);
+ if (res->id != -1)
+ idr_remove(idr, res->id);
+ res->id = -1;
+ spin_unlock(&dev_priv->resource_lock);
+}
+
+static void vmw_resource_release(struct kref *kref)
+{
+ struct vmw_resource *res =
+ container_of(kref, struct vmw_resource, kref);
+ struct vmw_private *dev_priv = res->dev_priv;
+ int id;
+ struct idr *idr = &dev_priv->res_idr[res->func->res_type];
+
+ spin_lock(&dev_priv->resource_lock);
+ list_del_init(&res->lru_head);
+ 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 (vmw_resource_mob_attached(res) &&
+ res->func->unbind != NULL) {
+ struct ttm_validate_buffer val_buf;
+
+ val_buf.bo = bo;
+ val_buf.num_shared = 0;
+ res->func->unbind(res, false, &val_buf);
+ }
+ res->backup_dirty = false;
+ vmw_resource_mob_detach(res);
+ ttm_bo_unreserve(bo);
+ vmw_bo_unreference(&res->backup);
+ }
+
+ if (likely(res->hw_destroy != NULL)) {
+ mutex_lock(&dev_priv->binding_mutex);
+ vmw_binding_res_list_kill(&res->binding_head);
+ mutex_unlock(&dev_priv->binding_mutex);
+ res->hw_destroy(res);
+ }
+
+ id = res->id;
+ if (res->res_free != NULL)
+ res->res_free(res);
+ else
+ kfree(res);
+
+ spin_lock(&dev_priv->resource_lock);
+ if (id != -1)
+ idr_remove(idr, id);
+ spin_unlock(&dev_priv->resource_lock);
+}
+
+void vmw_resource_unreference(struct vmw_resource **p_res)
+{
+ struct vmw_resource *res = *p_res;
+
+ *p_res = NULL;
+ kref_put(&res->kref, vmw_resource_release);
+}
+
+
+/**
+ * vmw_resource_alloc_id - release a resource id to the id manager.
+ *
+ * @res: Pointer to the resource.
+ *
+ * Allocate the lowest free resource from the resource manager, and set
+ * @res->id to that id. Returns 0 on success and -ENOMEM on failure.
+ */
+int vmw_resource_alloc_id(struct vmw_resource *res)
+{
+ struct vmw_private *dev_priv = res->dev_priv;
+ int ret;
+ struct idr *idr = &dev_priv->res_idr[res->func->res_type];
+
+ BUG_ON(res->id != -1);
+
+ idr_preload(GFP_KERNEL);
+ spin_lock(&dev_priv->resource_lock);
+
+ ret = idr_alloc(idr, res, 1, 0, GFP_NOWAIT);
+ if (ret >= 0)
+ res->id = ret;
+
+ spin_unlock(&dev_priv->resource_lock);
+ idr_preload_end();
+ return ret < 0 ? ret : 0;
+}
+
+/**
+ * vmw_resource_init - initialize a struct vmw_resource
+ *
+ * @dev_priv: Pointer to a device private struct.
+ * @res: The struct vmw_resource to initialize.
+ * @obj_type: Resource object type.
+ * @delay_id: Boolean whether to defer device id allocation until
+ * the first validation.
+ * @res_free: Resource destructor.
+ * @func: Resource function table.
+ */
+int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res,
+ bool delay_id,
+ void (*res_free) (struct vmw_resource *res),
+ const struct vmw_res_func *func)
+{
+ kref_init(&res->kref);
+ res->hw_destroy = NULL;
+ res->res_free = res_free;
+ res->dev_priv = dev_priv;
+ res->func = func;
+ 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->used_prio = 3;
+ if (delay_id)
+ return 0;
+ else
+ return vmw_resource_alloc_id(res);
+}
+
+
+/**
+ * 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.
+ */
+int vmw_user_resource_lookup_handle(struct vmw_private *dev_priv,
+ struct ttm_object_file *tfile,
+ uint32_t handle,
+ const struct vmw_user_resource_conv
+ *converter,
+ struct vmw_resource **p_res)
+{
+ struct ttm_base_object *base;
+ struct vmw_resource *res;
+ int ret = -EINVAL;
+
+ base = ttm_base_object_lookup(tfile, handle);
+ if (unlikely(base == NULL))
+ return -EINVAL;
+
+ if (unlikely(ttm_base_object_type(base) != converter->object_type))
+ goto out_bad_resource;
+
+ res = converter->base_obj_to_res(base);
+ kref_get(&res->kref);
+
+ *p_res = res;
+ ret = 0;
+
+out_bad_resource:
+ 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);
+}
+
+/**
+ * Helper function that looks either a surface or bo.
+ *
+ * The pointer this pointed at by out_surf and out_buf needs to be null.
+ */
+int vmw_user_lookup_handle(struct vmw_private *dev_priv,
+ struct ttm_object_file *tfile,
+ uint32_t handle,
+ struct vmw_surface **out_surf,
+ struct vmw_buffer_object **out_buf)
+{
+ struct vmw_resource *res;
+ int ret;
+
+ BUG_ON(*out_surf || *out_buf);
+
+ ret = vmw_user_resource_lookup_handle(dev_priv, tfile, handle,
+ user_surface_converter,
+ &res);
+ if (!ret) {
+ *out_surf = vmw_res_to_srf(res);
+ return 0;
+ }
+
+ *out_surf = NULL;
+ ret = vmw_user_bo_lookup(tfile, handle, out_buf, NULL);
+ return ret;
+}
+
+/**
+ * vmw_resource_buf_alloc - Allocate a backup buffer for a resource.
+ *
+ * @res: The resource for which to allocate a backup buffer.
+ * @interruptible: Whether any sleeps during allocation should be
+ * performed while interruptible.
+ */
+static int vmw_resource_buf_alloc(struct vmw_resource *res,
+ bool interruptible)
+{
+ unsigned long size =
+ (res->backup_size + PAGE_SIZE - 1) & PAGE_MASK;
+ struct vmw_buffer_object *backup;
+ int ret;
+
+ if (likely(res->backup)) {
+ BUG_ON(res->backup->base.num_pages * PAGE_SIZE < size);
+ return 0;
+ }
+
+ backup = kzalloc(sizeof(*backup), GFP_KERNEL);
+ if (unlikely(!backup))
+ return -ENOMEM;
+
+ ret = vmw_bo_init(res->dev_priv, backup, res->backup_size,
+ res->func->backup_placement,
+ interruptible,
+ &vmw_bo_bo_free);
+ if (unlikely(ret != 0))
+ goto out_no_bo;
+
+ res->backup = backup;
+
+out_no_bo:
+ return ret;
+}
+
+/**
+ * vmw_resource_do_validate - Make a resource up-to-date and visible
+ * to the device.
+ *
+ * @res: The resource to make visible to the device.
+ * @val_buf: Information about a buffer possibly
+ * containing backup data if a bind operation is needed.
+ *
+ * On hardware resource shortage, this function returns -EBUSY and
+ * 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)
+{
+ int ret = 0;
+ const struct vmw_res_func *func = res->func;
+
+ if (unlikely(res->id == -1)) {
+ ret = func->create(res);
+ if (unlikely(ret != 0))
+ return ret;
+ }
+
+ if (func->bind &&
+ ((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)
+ vmw_resource_mob_attach(res);
+ }
+
+ return 0;
+
+out_bind_failed:
+ func->destroy(res);
+
+ return ret;
+}
+
+/**
+ * vmw_resource_unreserve - Unreserve a resource previously reserved for
+ * 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.
+ * @new_backup_offset: New backup offset if @switch_backup is true.
+ *
+ * Currently unreserving a resource means putting it back on the device's
+ * 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)
+{
+ struct vmw_private *dev_priv = res->dev_priv;
+
+ if (!list_empty(&res->lru_head))
+ return;
+
+ if (switch_backup && new_backup != res->backup) {
+ if (res->backup) {
+ vmw_resource_mob_detach(res);
+ vmw_bo_unreference(&res->backup);
+ }
+
+ if (new_backup) {
+ res->backup = vmw_bo_reference(new_backup);
+ vmw_resource_mob_attach(res);
+ } else {
+ res->backup = NULL;
+ }
+ }
+ 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;
+
+ spin_lock(&dev_priv->resource_lock);
+ list_add_tail(&res->lru_head,
+ &res->dev_priv->res_lru[res->func->res_type]);
+ spin_unlock(&dev_priv->resource_lock);
+}
+
+/**
+ * vmw_resource_check_buffer - Check whether a backup buffer is needed
+ * for a resource and in that case, allocate
+ * one, reserve and validate it.
+ *
+ * @ticket: The ww aqcquire context to use, or NULL if trylocking.
+ * @res: The resource for which to allocate a backup buffer.
+ * @interruptible: Whether any sleeps during allocation should be
+ * performed while interruptible.
+ * @val_buf: On successful return contains data about the
+ * reserved and validated backup buffer.
+ */
+static int
+vmw_resource_check_buffer(struct ww_acquire_ctx *ticket,
+ struct vmw_resource *res,
+ bool interruptible,
+ struct ttm_validate_buffer *val_buf)
+{
+ struct ttm_operation_ctx ctx = { true, false };
+ struct list_head val_list;
+ bool backup_dirty = false;
+ int ret;
+
+ if (unlikely(res->backup == NULL)) {
+ ret = vmw_resource_buf_alloc(res, interruptible);
+ if (unlikely(ret != 0))
+ return ret;
+ }
+
+ INIT_LIST_HEAD(&val_list);
+ 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,
+ true);
+ if (unlikely(ret != 0))
+ goto out_no_reserve;
+
+ if (res->func->needs_backup && !vmw_resource_mob_attached(res))
+ return 0;
+
+ backup_dirty = res->backup_dirty;
+ ret = ttm_bo_validate(&res->backup->base,
+ res->func->backup_placement,
+ &ctx);
+
+ if (unlikely(ret != 0))
+ goto out_no_validate;
+
+ return 0;
+
+out_no_validate:
+ ttm_eu_backoff_reservation(ticket, &val_list);
+out_no_reserve:
+ ttm_bo_put(val_buf->bo);
+ val_buf->bo = NULL;
+ if (backup_dirty)
+ vmw_bo_unreference(&res->backup);
+
+ return ret;
+}
+
+/**
+ * vmw_resource_reserve - Reserve a resource for command submission
+ *
+ * @res: The resource to reserve.
+ *
+ * This function takes the resource off the LRU list and make sure
+ * a backup buffer is present for guest-backed resources. However,
+ * the buffer may not be bound to the resource at this point.
+ *
+ */
+int vmw_resource_reserve(struct vmw_resource *res, bool interruptible,
+ bool no_backup)
+{
+ struct vmw_private *dev_priv = res->dev_priv;
+ int ret;
+
+ spin_lock(&dev_priv->resource_lock);
+ list_del_init(&res->lru_head);
+ spin_unlock(&dev_priv->resource_lock);
+
+ if (res->func->needs_backup && res->backup == NULL &&
+ !no_backup) {
+ ret = vmw_resource_buf_alloc(res, interruptible);
+ if (unlikely(ret != 0)) {
+ DRM_ERROR("Failed to allocate a backup buffer "
+ "of size %lu. bytes\n",
+ (unsigned long) res->backup_size);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * vmw_resource_backoff_reservation - Unreserve and unreference a
+ * backup buffer
+ *.
+ * @ticket: The ww acquire ctx used for reservation.
+ * @val_buf: Backup buffer information.
+ */
+static void
+vmw_resource_backoff_reservation(struct ww_acquire_ctx *ticket,
+ struct ttm_validate_buffer *val_buf)
+{
+ struct list_head val_list;
+
+ if (likely(val_buf->bo == NULL))
+ return;
+
+ INIT_LIST_HEAD(&val_list);
+ list_add_tail(&val_buf->head, &val_list);
+ ttm_eu_backoff_reservation(ticket, &val_list);
+ ttm_bo_put(val_buf->bo);
+ val_buf->bo = NULL;
+}
+
+/**
+ * vmw_resource_do_evict - Evict a resource, and transfer its data
+ * to a backup buffer.
+ *
+ * @ticket: The ww acquire ticket to use, or NULL if trylocking.
+ * @res: The resource to evict.
+ * @interruptible: Whether to wait interruptible.
+ */
+static int vmw_resource_do_evict(struct ww_acquire_ctx *ticket,
+ struct vmw_resource *res, bool interruptible)
+{
+ struct ttm_validate_buffer val_buf;
+ const struct vmw_res_func *func = res->func;
+ int ret;
+
+ BUG_ON(!func->may_evict);
+
+ val_buf.bo = NULL;
+ 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 || vmw_resource_mob_attached(res)))) {
+ ret = func->unbind(res, res->res_dirty, &val_buf);
+ if (unlikely(ret != 0))
+ goto out_no_unbind;
+ vmw_resource_mob_detach(res);
+ }
+ ret = func->destroy(res);
+ res->backup_dirty = true;
+ res->res_dirty = false;
+out_no_unbind:
+ vmw_resource_backoff_reservation(ticket, &val_buf);
+
+ return ret;
+}
+
+
+/**
+ * vmw_resource_validate - Make a resource up-to-date and visible
+ * to the device.
+ * @res: The resource to make visible to the device.
+ * @intr: Perform waits interruptible if possible.
+ *
+ * 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, bool intr)
+{
+ int ret;
+ struct vmw_resource *evict_res;
+ struct vmw_private *dev_priv = res->dev_priv;
+ struct list_head *lru_list = &dev_priv->res_lru[res->func->res_type];
+ struct ttm_validate_buffer val_buf;
+ unsigned err_count = 0;
+
+ if (!res->func->create)
+ return 0;
+
+ val_buf.bo = NULL;
+ val_buf.num_shared = 0;
+ if (res->backup)
+ val_buf.bo = &res->backup->base;
+ do {
+ ret = vmw_resource_do_validate(res, &val_buf);
+ if (likely(ret != -EBUSY))
+ break;
+
+ 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;
+ spin_unlock(&dev_priv->resource_lock);
+ break;
+ }
+
+ evict_res = vmw_resource_reference
+ (list_first_entry(lru_list, struct vmw_resource,
+ lru_head));
+ list_del_init(&evict_res->lru_head);
+
+ spin_unlock(&dev_priv->resource_lock);
+
+ /* Trylock backup buffers with a NULL ticket. */
+ ret = vmw_resource_do_evict(NULL, evict_res, intr);
+ if (unlikely(ret != 0)) {
+ spin_lock(&dev_priv->resource_lock);
+ list_add_tail(&evict_res->lru_head, lru_list);
+ spin_unlock(&dev_priv->resource_lock);
+ if (ret == -ERESTARTSYS ||
+ ++err_count > VMW_RES_EVICT_ERR_COUNT) {
+ vmw_resource_unreference(&evict_res);
+ goto out_no_validate;
+ }
+ }
+
+ vmw_resource_unreference(&evict_res);
+ } while (1);
+
+ if (unlikely(ret != 0))
+ goto out_no_validate;
+ else if (!res->func->needs_backup && res->backup) {
+ WARN_ON_ONCE(vmw_resource_mob_attached(res));
+ vmw_bo_unreference(&res->backup);
+ }
+
+ return 0;
+
+out_no_validate:
+ return ret;
+}
+
+
+/**
+ * vmw_resource_unbind_list
+ *
+ * @vbo: Pointer to the current backing MOB.
+ *
+ * Evicts the Guest Backed hardware resource if the backup
+ * buffer is being moved out of MOB memory.
+ * Note that this function will not race with the resource
+ * validation code, since resource validation and eviction
+ * both require the backup buffer to be reserved.
+ */
+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
+ };
+
+ dma_resv_assert_held(vbo->base.base.resv);
+ 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);
+ }
+
+ (void) ttm_bo_wait(&vbo->base, false, false);
+}
+
+
+/**
+ * vmw_query_readback_all - Read back cached query states
+ *
+ * @dx_query_mob: Buffer containing the DX query MOB
+ *
+ * Read back cached states from the device if they exist. This function
+ * assumings binding_mutex is held.
+ */
+int vmw_query_readback_all(struct vmw_buffer_object *dx_query_mob)
+{
+ struct vmw_resource *dx_query_ctx;
+ struct vmw_private *dev_priv;
+ struct {
+ SVGA3dCmdHeader header;
+ SVGA3dCmdDXReadbackAllQuery body;
+ } *cmd;
+
+
+ /* No query bound, so do nothing */
+ if (!dx_query_mob || !dx_query_mob->dx_query_ctx)
+ return 0;
+
+ 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))
+ return -ENOMEM;
+
+ cmd->header.id = SVGA_3D_CMD_DX_READBACK_ALL_QUERY;
+ cmd->header.size = sizeof(cmd->body);
+ cmd->body.cid = dx_query_ctx->id;
+
+ vmw_fifo_commit(dev_priv, sizeof(*cmd));
+
+ /* Triggers a rebind the next time affected context is bound */
+ dx_query_mob->dx_query_ctx = NULL;
+
+ return 0;
+}
+
+
+
+/**
+ * vmw_query_move_notify - Read back cached query states
+ *
+ * @bo: The TTM buffer object about to move.
+ * @mem: The memory region @bo is moving to.
+ *
+ * Called before the query MOB is swapped out to read back cached query
+ * states from the device.
+ */
+void vmw_query_move_notify(struct ttm_buffer_object *bo,
+ struct ttm_mem_reg *mem)
+{
+ struct vmw_buffer_object *dx_query_mob;
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct vmw_private *dev_priv;
+
+
+ dev_priv = container_of(bdev, struct vmw_private, bdev);
+
+ mutex_lock(&dev_priv->binding_mutex);
+
+ dx_query_mob = container_of(bo, struct vmw_buffer_object, base);
+ if (mem == NULL || !dx_query_mob || !dx_query_mob->dx_query_ctx) {
+ mutex_unlock(&dev_priv->binding_mutex);
+ return;
+ }
+
+ /* If BO is being moved from MOB to system memory */
+ if (mem->mem_type == TTM_PL_SYSTEM && bo->mem.mem_type == VMW_PL_MOB) {
+ struct vmw_fence_obj *fence;
+
+ (void) vmw_query_readback_all(dx_query_mob);
+ mutex_unlock(&dev_priv->binding_mutex);
+
+ /* Create a fence and attach the BO to it */
+ (void) vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
+ vmw_bo_fence_single(bo, fence);
+
+ if (fence != NULL)
+ vmw_fence_obj_unreference(&fence);
+
+ (void) ttm_bo_wait(bo, false, false);
+ } else
+ mutex_unlock(&dev_priv->binding_mutex);
+
+}
+
+/**
+ * vmw_resource_needs_backup - Return whether a resource needs a backup buffer.
+ *
+ * @res: The resource being queried.
+ */
+bool vmw_resource_needs_backup(const struct vmw_resource *res)
+{
+ return res->func->needs_backup;
+}
+
+/**
+ * vmw_resource_evict_type - Evict all resources of a specific type
+ *
+ * @dev_priv: Pointer to a device private struct
+ * @type: The resource type to evict
+ *
+ * To avoid thrashing starvation or as part of the hibernation sequence,
+ * try to evict all evictable resources of a specific type.
+ */
+static void vmw_resource_evict_type(struct vmw_private *dev_priv,
+ enum vmw_res_type type)
+{
+ struct list_head *lru_list = &dev_priv->res_lru[type];
+ struct vmw_resource *evict_res;
+ unsigned err_count = 0;
+ int ret;
+ struct ww_acquire_ctx ticket;
+
+ do {
+ spin_lock(&dev_priv->resource_lock);
+
+ if (list_empty(lru_list))
+ goto out_unlock;
+
+ evict_res = vmw_resource_reference(
+ list_first_entry(lru_list, struct vmw_resource,
+ lru_head));
+ list_del_init(&evict_res->lru_head);
+ 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)) {
+ spin_lock(&dev_priv->resource_lock);
+ list_add_tail(&evict_res->lru_head, lru_list);
+ spin_unlock(&dev_priv->resource_lock);
+ if (++err_count > VMW_RES_EVICT_ERR_COUNT) {
+ vmw_resource_unreference(&evict_res);
+ return;
+ }
+ }
+
+ vmw_resource_unreference(&evict_res);
+ } while (1);
+
+out_unlock:
+ spin_unlock(&dev_priv->resource_lock);
+}
+
+/**
+ * vmw_resource_evict_all - Evict all evictable resources
+ *
+ * @dev_priv: Pointer to a device private struct
+ *
+ * To avoid thrashing starvation or as part of the hibernation sequence,
+ * evict all evictable resources. In particular this means that all
+ * guest-backed resources that are registered with the device are
+ * evicted and the OTable becomes clean.
+ */
+void vmw_resource_evict_all(struct vmw_private *dev_priv)
+{
+ enum vmw_res_type type;
+
+ mutex_lock(&dev_priv->cmdbuf_mutex);
+
+ for (type = 0; type < vmw_res_max; ++type)
+ vmw_resource_evict_type(dev_priv, type);
+
+ mutex_unlock(&dev_priv->cmdbuf_mutex);
+}
+
+/**
+ * vmw_resource_pin - Add a pin reference on a resource
+ *
+ * @res: The resource to add a pin reference on
+ *
+ * This function adds a pin reference, and if needed validates the resource.
+ * Having a pin reference means that the resource can never be evicted, and
+ * its id will never change as long as there is a pin reference.
+ * This function returns 0 on success and a negative error code on failure.
+ */
+int vmw_resource_pin(struct vmw_resource *res, bool interruptible)
+{
+ struct ttm_operation_ctx ctx = { interruptible, false };
+ struct vmw_private *dev_priv = res->dev_priv;
+ int ret;
+
+ ttm_write_lock(&dev_priv->reservation_sem, interruptible);
+ mutex_lock(&dev_priv->cmdbuf_mutex);
+ ret = vmw_resource_reserve(res, interruptible, false);
+ if (ret)
+ goto out_no_reserve;
+
+ if (res->pin_count == 0) {
+ struct vmw_buffer_object *vbo = NULL;
+
+ if (res->backup) {
+ vbo = res->backup;
+
+ ttm_bo_reserve(&vbo->base, interruptible, false, NULL);
+ if (!vbo->pin_count) {
+ ret = ttm_bo_validate
+ (&vbo->base,
+ res->func->backup_placement,
+ &ctx);
+ if (ret) {
+ ttm_bo_unreserve(&vbo->base);
+ goto out_no_validate;
+ }
+ }
+
+ /* Do we really need to pin the MOB as well? */
+ vmw_bo_pin_reserved(vbo, true);
+ }
+ ret = vmw_resource_validate(res, interruptible);
+ if (vbo)
+ ttm_bo_unreserve(&vbo->base);
+ if (ret)
+ goto out_no_validate;
+ }
+ res->pin_count++;
+
+out_no_validate:
+ 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);
+
+ return ret;
+}
+
+/**
+ * vmw_resource_unpin - Remove a pin reference from a resource
+ *
+ * @res: The resource to remove a pin reference from
+ *
+ * Having a pin reference means that the resource can never be evicted, and
+ * its id will never change as long as there is a pin reference.
+ */
+void vmw_resource_unpin(struct vmw_resource *res)
+{
+ struct vmw_private *dev_priv = res->dev_priv;
+ int ret;
+
+ (void) ttm_read_lock(&dev_priv->reservation_sem, false);
+ mutex_lock(&dev_priv->cmdbuf_mutex);
+
+ ret = vmw_resource_reserve(res, false, true);
+ WARN_ON(ret);
+
+ WARN_ON(res->pin_count == 0);
+ if (--res->pin_count == 0 && res->backup) {
+ struct vmw_buffer_object *vbo = res->backup;
+
+ (void) ttm_bo_reserve(&vbo->base, false, false, NULL);
+ vmw_bo_pin_reserved(vbo, false);
+ ttm_bo_unreserve(&vbo->base);
+ }
+
+ vmw_resource_unreserve(res, false, false, false, NULL, 0UL);
+
+ mutex_unlock(&dev_priv->cmdbuf_mutex);
+ ttm_read_unlock(&dev_priv->reservation_sem);
+}
+
+/**
+ * vmw_res_type - Return the resource type
+ *
+ * @res: Pointer to the resource
+ */
+enum vmw_res_type vmw_res_type(const struct vmw_resource *res)
+{
+ return res->func->res_type;
+}