#include <drm/ttm/ttm_placement.h>
#include <drm/drmP.h>
-struct vmw_user_context {
- struct ttm_base_object base;
- struct vmw_resource res;
+/**
+ * struct vmw_user_resource_conv - Identify a derived user-exported resource
+ * type and provide a function to convert its ttm_base_object pointer to
+ * a struct vmw_resource
+ */
+struct vmw_user_resource_conv {
+ enum ttm_object_type object_type;
+ struct vmw_resource *(*base_obj_to_res)(struct ttm_base_object *base);
+ void (*res_free) (struct vmw_resource *res);
};
-struct vmw_user_surface {
- struct ttm_base_object base;
- struct vmw_surface srf;
- uint32_t size;
+/**
+ * struct vmw_res_func - members and functions common for a resource type
+ *
+ * @res_type: Enum that identifies the lru list to use for eviction.
+ * @needs_backup: Whether the resource is guest-backed and needs
+ * persistent buffer storage.
+ * @type_name: String that identifies the resource type.
+ * @backup_placement: TTM placement for backup buffers.
+ * @may_evict Whether the resource may be evicted.
+ * @create: Create a hardware resource.
+ * @destroy: Destroy a hardware resource.
+ * @bind: Bind a hardware resource to persistent buffer storage.
+ * @unbind: Unbind a hardware resource from persistent
+ * buffer storage.
+ */
+
+struct vmw_res_func {
+ enum vmw_res_type res_type;
+ bool needs_backup;
+ const char *type_name;
+ struct ttm_placement *backup_placement;
+ bool may_evict;
+
+ int (*create) (struct vmw_resource *res);
+ int (*destroy) (struct vmw_resource *res);
+ int (*bind) (struct vmw_resource *res,
+ struct ttm_validate_buffer *val_buf);
+ int (*unbind) (struct vmw_resource *res,
+ bool readback,
+ struct ttm_validate_buffer *val_buf);
};
struct vmw_user_dma_buffer {
struct vmw_stream stream;
};
+
+static uint64_t vmw_user_stream_size;
+
+static const struct vmw_res_func vmw_stream_func = {
+ .res_type = vmw_res_stream,
+ .needs_backup = false,
+ .may_evict = false,
+ .type_name = "video streams",
+ .backup_placement = NULL,
+ .create = NULL,
+ .destroy = NULL,
+ .bind = NULL,
+ .unbind = NULL
+};
+
+struct vmw_user_context {
+ struct ttm_base_object base;
+ struct vmw_resource res;
+};
+
+static void vmw_user_context_free(struct vmw_resource *res);
+static struct vmw_resource *
+vmw_user_context_base_to_res(struct ttm_base_object *base);
+
+static uint64_t vmw_user_context_size;
+
+static const struct vmw_user_resource_conv user_context_conv = {
+ .object_type = VMW_RES_CONTEXT,
+ .base_obj_to_res = vmw_user_context_base_to_res,
+ .res_free = vmw_user_context_free
+};
+
+const struct vmw_user_resource_conv *user_context_converter =
+ &user_context_conv;
+
+
+static const struct vmw_res_func vmw_legacy_context_func = {
+ .res_type = vmw_res_context,
+ .needs_backup = false,
+ .may_evict = false,
+ .type_name = "legacy contexts",
+ .backup_placement = NULL,
+ .create = NULL,
+ .destroy = NULL,
+ .bind = NULL,
+ .unbind = NULL
+};
+
+
+/**
+ * struct vmw_user_surface - User-space visible surface resource
+ *
+ * @base: The TTM base object handling user-space visibility.
+ * @srf: The surface metadata.
+ * @size: TTM accounting size for the surface.
+ */
+struct vmw_user_surface {
+ struct ttm_base_object base;
+ struct vmw_surface srf;
+ uint32_t size;
+ uint32_t backup_handle;
+};
+
+/**
+ * struct vmw_surface_offset - Backing store mip level offset info
+ *
+ * @face: Surface face.
+ * @mip: Mip level.
+ * @bo_offset: Offset into backing store of this mip level.
+ *
+ */
struct vmw_surface_offset {
uint32_t face;
uint32_t mip;
uint32_t bo_offset;
};
+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);
+static int vmw_legacy_srf_bind(struct vmw_resource *res,
+ struct ttm_validate_buffer *val_buf);
+static int vmw_legacy_srf_unbind(struct vmw_resource *res,
+ bool readback,
+ struct ttm_validate_buffer *val_buf);
+static int vmw_legacy_srf_create(struct vmw_resource *res);
+static int vmw_legacy_srf_destroy(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,
+ .res_free = vmw_user_surface_free
+};
+
+const struct vmw_user_resource_conv *user_surface_converter =
+ &user_surface_conv;
+
-static uint64_t vmw_user_context_size;
static uint64_t vmw_user_surface_size;
-static uint64_t vmw_user_stream_size;
+
+static const struct vmw_res_func vmw_legacy_surface_func = {
+ .res_type = vmw_res_surface,
+ .needs_backup = false,
+ .may_evict = true,
+ .type_name = "legacy surfaces",
+ .backup_placement = &vmw_srf_placement,
+ .create = &vmw_legacy_srf_create,
+ .destroy = &vmw_legacy_srf_destroy,
+ .bind = &vmw_legacy_srf_bind,
+ .unbind = &vmw_legacy_srf_unbind
+};
+
static inline struct vmw_dma_buffer *
vmw_dma_buffer(struct ttm_buffer_object *bo)
static 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];
write_lock(&dev_priv->resource_lock);
if (res->id != -1)
- idr_remove(res->idr, res->id);
+ idr_remove(idr, res->id);
res->id = -1;
write_unlock(&dev_priv->resource_lock);
}
struct vmw_resource *res =
container_of(kref, struct vmw_resource, kref);
struct vmw_private *dev_priv = res->dev_priv;
- int id = res->id;
- struct idr *idr = res->idr;
+ int id;
+ struct idr *idr = &dev_priv->res_idr[res->func->res_type];
res->avail = false;
- if (res->remove_from_lists != NULL)
- res->remove_from_lists(res);
+ list_del_init(&res->lru_head);
write_unlock(&dev_priv->resource_lock);
+ if (res->backup) {
+ struct ttm_buffer_object *bo = &res->backup->base;
+
+ ttm_bo_reserve(bo, false, false, false, 0);
+ if (!list_empty(&res->mob_head) &&
+ res->func->unbind != NULL) {
+ struct ttm_validate_buffer val_buf;
+
+ val_buf.bo = bo;
+ res->func->unbind(res, false, &val_buf);
+ }
+ res->backup_dirty = false;
+ list_del_init(&res->mob_head);
+ ttm_bo_unreserve(bo);
+ vmw_dmabuf_unreference(&res->backup);
+ }
if (likely(res->hw_destroy != NULL))
res->hw_destroy(res);
+ id = res->id;
if (res->res_free != NULL)
res->res_free(res);
else
/**
* vmw_resource_alloc_id - release a resource id to the id manager.
*
- * @dev_priv: Pointer to the device private structure.
* @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.
*/
-static int vmw_resource_alloc_id(struct vmw_private *dev_priv,
- struct vmw_resource *res)
+static 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);
do {
- if (unlikely(idr_pre_get(res->idr, GFP_KERNEL) == 0))
+ if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0))
return -ENOMEM;
write_lock(&dev_priv->resource_lock);
- ret = idr_get_new_above(res->idr, res, 1, &res->id);
+ ret = idr_get_new_above(idr, res, 1, &res->id);
write_unlock(&dev_priv->resource_lock);
} while (ret == -EAGAIN);
return ret;
}
-
+/**
+ * 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.
+ */
static int vmw_resource_init(struct vmw_private *dev_priv,
struct vmw_resource *res,
- struct idr *idr,
- enum ttm_object_type obj_type,
bool delay_id,
void (*res_free) (struct vmw_resource *res),
- void (*remove_from_lists)
- (struct vmw_resource *res))
+ const struct vmw_res_func *func)
{
kref_init(&res->kref);
res->hw_destroy = NULL;
res->res_free = res_free;
- res->remove_from_lists = remove_from_lists;
- res->res_type = obj_type;
- res->idr = idr;
res->avail = false;
res->dev_priv = dev_priv;
- INIT_LIST_HEAD(&res->query_head);
- INIT_LIST_HEAD(&res->validate_head);
+ res->func = func;
+ INIT_LIST_HEAD(&res->lru_head);
+ INIT_LIST_HEAD(&res->mob_head);
res->id = -1;
+ res->backup = NULL;
+ res->backup_offset = 0;
+ res->backup_dirty = false;
+ res->res_dirty = false;
if (delay_id)
return 0;
else
- return vmw_resource_alloc_id(dev_priv, res);
+ return vmw_resource_alloc_id(res);
}
/**
* Activate basically means that the function vmw_resource_lookup will
* find it.
*/
-
static void vmw_resource_activate(struct vmw_resource *res,
void (*hw_destroy) (struct vmw_resource *))
{
} *cmd;
- vmw_execbuf_release_pinned_bo(dev_priv, true, res->id);
-
+ vmw_execbuf_release_pinned_bo(dev_priv);
cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
if (unlikely(cmd == NULL)) {
DRM_ERROR("Failed reserving FIFO space for surface "
SVGA3dCmdDefineContext body;
} *cmd;
- ret = vmw_resource_init(dev_priv, res, &dev_priv->context_idr,
- VMW_RES_CONTEXT, false, res_free, NULL);
+ ret = vmw_resource_init(dev_priv, res, false,
+ res_free, &vmw_legacy_context_func);
if (unlikely(ret != 0)) {
DRM_ERROR("Failed to allocate a resource id.\n");
return NULL;
ret = vmw_context_init(dev_priv, res, NULL);
+
return (ret == 0) ? res : NULL;
}
* User-space context management:
*/
+static struct vmw_resource *
+vmw_user_context_base_to_res(struct ttm_base_object *base)
+{
+ return &(container_of(base, struct vmw_user_context, base)->res);
+}
+
static void vmw_user_context_free(struct vmw_resource *res)
{
struct vmw_user_context *ctx =
int vmw_context_destroy_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
- struct vmw_private *dev_priv = vmw_priv(dev);
- struct vmw_resource *res;
- struct vmw_user_context *ctx;
struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
- int ret = 0;
-
- res = vmw_resource_lookup(dev_priv, &dev_priv->context_idr, arg->cid);
- if (unlikely(res == NULL))
- return -EINVAL;
-
- if (res->res_free != &vmw_user_context_free) {
- ret = -EINVAL;
- goto out;
- }
- ctx = container_of(res, struct vmw_user_context, res);
- if (ctx->base.tfile != tfile && !ctx->base.shareable) {
- ret = -EPERM;
- goto out;
- }
-
- ttm_ref_object_base_unref(tfile, ctx->base.hash.key, TTM_REF_USAGE);
-out:
- vmw_resource_unreference(&res);
- return ret;
+ return ttm_ref_object_base_unref(tfile, arg->cid, TTM_REF_USAGE);
}
int vmw_context_define_ioctl(struct drm_device *dev, void *data,
goto out_unlock;
}
- ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (unlikely(ctx == NULL)) {
ttm_mem_global_free(vmw_mem_glob(dev_priv),
vmw_user_context_size);
goto out_err;
}
- arg->cid = res->id;
+ arg->cid = ctx->base.hash.key;
out_err:
vmw_resource_unreference(&res);
out_unlock:
}
-int vmw_context_check(struct vmw_private *dev_priv,
- struct ttm_object_file *tfile,
- int id,
- struct vmw_resource **p_res)
-{
- struct vmw_resource *res;
- int ret = 0;
-
- read_lock(&dev_priv->resource_lock);
- res = idr_find(&dev_priv->context_idr, id);
- if (res && res->avail) {
- struct vmw_user_context *ctx =
- container_of(res, struct vmw_user_context, res);
- if (ctx->base.tfile != tfile && !ctx->base.shareable)
- ret = -EPERM;
- if (p_res)
- *p_res = vmw_resource_reference(res);
- } else
- ret = -EINVAL;
- read_unlock(&dev_priv->resource_lock);
-
- return ret;
-}
-
+/**
+ * struct vmw_bpp - Bits per pixel info for surface storage size computation.
+ *
+ * @bpp: Bits per pixel.
+ * @s_bpp: Stride bits per pixel. See definition below.
+ *
+ */
struct vmw_bpp {
uint8_t bpp;
uint8_t s_bpp;
/**
- * Surface management.
+ * struct vmw_surface_dma - SVGA3D DMA command
*/
-
struct vmw_surface_dma {
SVGA3dCmdHeader header;
SVGA3dCmdSurfaceDMA body;
SVGA3dCmdSurfaceDMASuffix suffix;
};
+/**
+ * struct vmw_surface_define - SVGA3D Surface Define command
+ */
struct vmw_surface_define {
SVGA3dCmdHeader header;
SVGA3dCmdDefineSurface body;
};
+/**
+ * struct vmw_surface_destroy - SVGA3D Surface Destroy command
+ */
struct vmw_surface_destroy {
SVGA3dCmdHeader header;
SVGA3dCmdDestroySurface body;
}
}
-
/**
* vmw_surface_dma_encode - Encode a surface_dma command.
*
};
+/**
+ * vmw_hw_surface_destroy - destroy a Device surface
+ *
+ * @res: Pointer to a struct vmw_resource embedded in a struct
+ * vmw_surface.
+ *
+ * Destroys a the device surface associated with a struct vmw_surface if
+ * any, and adjusts accounting and resource count accordingly.
+ */
static void vmw_hw_surface_destroy(struct vmw_resource *res)
{
*/
mutex_lock(&dev_priv->cmdbuf_mutex);
- srf = container_of(res, struct vmw_surface, res);
- dev_priv->used_memory_size -= srf->backup_size;
+ srf = vmw_res_to_srf(res);
+ dev_priv->used_memory_size -= res->backup_size;
mutex_unlock(&dev_priv->cmdbuf_mutex);
-
}
vmw_3d_resource_dec(dev_priv, false);
}
-void vmw_surface_res_free(struct vmw_resource *res)
-{
- struct vmw_surface *srf = container_of(res, struct vmw_surface, res);
-
- if (srf->backup)
- ttm_bo_unref(&srf->backup);
- kfree(srf->offsets);
- kfree(srf->sizes);
- kfree(srf->snooper.image);
- kfree(srf);
-}
-
-
/**
- * vmw_surface_do_validate - make a surface available to the device.
+ * vmw_legacy_srf_create - Create a device surface as part of the
+ * resource validation process.
*
- * @dev_priv: Pointer to a device private struct.
- * @srf: Pointer to a struct vmw_surface.
+ * @res: Pointer to a struct vmw_surface.
*
- * If the surface doesn't have a hw id, allocate one, and optionally
- * DMA the backed up surface contents to the device.
+ * If the surface doesn't have a hw id.
*
* Returns -EBUSY if there wasn't sufficient device resources to
* complete the validation. Retry after freeing up resources.
*
* May return other errors if the kernel is out of guest resources.
*/
-int vmw_surface_do_validate(struct vmw_private *dev_priv,
- struct vmw_surface *srf)
+static int vmw_legacy_srf_create(struct vmw_resource *res)
{
- struct vmw_resource *res = &srf->res;
- struct list_head val_list;
- struct ttm_validate_buffer val_buf;
+ struct vmw_private *dev_priv = res->dev_priv;
+ struct vmw_surface *srf;
uint32_t submit_size;
uint8_t *cmd;
int ret;
if (likely(res->id != -1))
return 0;
- if (unlikely(dev_priv->used_memory_size + srf->backup_size >=
+ srf = vmw_res_to_srf(res);
+ if (unlikely(dev_priv->used_memory_size + res->backup_size >=
dev_priv->memory_size))
return -EBUSY;
/*
- * Reserve- and validate the backup DMA bo.
- */
-
- if (srf->backup) {
- INIT_LIST_HEAD(&val_list);
- val_buf.bo = ttm_bo_reference(srf->backup);
- list_add_tail(&val_buf.head, &val_list);
- ret = ttm_eu_reserve_buffers(&val_list);
- if (unlikely(ret != 0))
- goto out_no_reserve;
-
- ret = ttm_bo_validate(srf->backup, &vmw_srf_placement,
- true, false, false);
- if (unlikely(ret != 0))
- goto out_no_validate;
- }
-
- /*
* Alloc id for the resource.
*/
- ret = vmw_resource_alloc_id(dev_priv, res);
+ ret = vmw_resource_alloc_id(res);
if (unlikely(ret != 0)) {
DRM_ERROR("Failed to allocate a surface id.\n");
goto out_no_id;
}
+
if (unlikely(res->id >= SVGA3D_MAX_SURFACE_IDS)) {
ret = -EBUSY;
goto out_no_fifo;
}
-
/*
- * Encode surface define- and dma commands.
+ * Encode surface define- commands.
*/
submit_size = vmw_surface_define_size(srf);
- if (srf->backup)
- submit_size += vmw_surface_dma_size(srf);
-
cmd = vmw_fifo_reserve(dev_priv, submit_size);
if (unlikely(cmd == NULL)) {
DRM_ERROR("Failed reserving FIFO space for surface "
- "validation.\n");
+ "creation.\n");
ret = -ENOMEM;
goto out_no_fifo;
}
vmw_surface_define_encode(srf, cmd);
- if (srf->backup) {
- SVGAGuestPtr ptr;
-
- cmd += vmw_surface_define_size(srf);
- vmw_bo_get_guest_ptr(srf->backup, &ptr);
- vmw_surface_dma_encode(srf, cmd, &ptr, true);
- }
-
vmw_fifo_commit(dev_priv, submit_size);
-
- /*
- * Create a fence object and fence the backup buffer.
- */
-
- if (srf->backup) {
- struct vmw_fence_obj *fence;
-
- (void) vmw_execbuf_fence_commands(NULL, dev_priv,
- &fence, NULL);
- ttm_eu_fence_buffer_objects(&val_list, fence);
- if (likely(fence != NULL))
- vmw_fence_obj_unreference(&fence);
- ttm_bo_unref(&val_buf.bo);
- ttm_bo_unref(&srf->backup);
- }
-
/*
* Surface memory usage accounting.
*/
- dev_priv->used_memory_size += srf->backup_size;
-
+ dev_priv->used_memory_size += res->backup_size;
return 0;
out_no_fifo:
vmw_resource_release_id(res);
out_no_id:
-out_no_validate:
- if (srf->backup)
- ttm_eu_backoff_reservation(&val_list);
-out_no_reserve:
- if (srf->backup)
- ttm_bo_unref(&val_buf.bo);
return ret;
}
/**
- * vmw_surface_evict - Evict a hw surface.
+ * vmw_legacy_srf_dma - Copy backup data to or from a legacy surface.
*
- * @dev_priv: Pointer to a device private struct.
- * @srf: Pointer to a struct vmw_surface
+ * @res: Pointer to a struct vmw_res embedded in a struct
+ * vmw_surface.
+ * @val_buf: Pointer to a struct ttm_validate_buffer containing
+ * information about the backup buffer.
+ * @bind: Boolean wether to DMA to the surface.
*
- * DMA the contents of a hw surface to a backup guest buffer object,
- * and destroy the hw surface, releasing its id.
+ * Transfer backup data to or from a legacy surface as part of the
+ * validation process.
+ * May return other errors if the kernel is out of guest resources.
+ * The backup buffer will be fenced or idle upon successful completion,
+ * and if the surface needs persistent backup storage, the backup buffer
+ * will also be returned reserved iff @bind is true.
*/
-int vmw_surface_evict(struct vmw_private *dev_priv,
- struct vmw_surface *srf)
+static int vmw_legacy_srf_dma(struct vmw_resource *res,
+ struct ttm_validate_buffer *val_buf,
+ bool bind)
{
- struct vmw_resource *res = &srf->res;
- struct list_head val_list;
- struct ttm_validate_buffer val_buf;
+ SVGAGuestPtr ptr;
+ struct vmw_fence_obj *fence;
uint32_t submit_size;
+ struct vmw_surface *srf = vmw_res_to_srf(res);
uint8_t *cmd;
- int ret;
- struct vmw_fence_obj *fence;
- SVGAGuestPtr ptr;
-
- BUG_ON(res->id == -1);
+ struct vmw_private *dev_priv = res->dev_priv;
- /*
- * Create a surface backup buffer object.
- */
+ BUG_ON(val_buf->bo == NULL);
- if (!srf->backup) {
- ret = ttm_bo_create(&dev_priv->bdev, srf->backup_size,
- ttm_bo_type_device,
- &vmw_srf_placement, 0, true,
- NULL, &srf->backup);
- if (unlikely(ret != 0))
- return ret;
+ submit_size = vmw_surface_dma_size(srf);
+ cmd = vmw_fifo_reserve(dev_priv, submit_size);
+ if (unlikely(cmd == NULL)) {
+ DRM_ERROR("Failed reserving FIFO space for surface "
+ "DMA.\n");
+ return -ENOMEM;
}
+ vmw_bo_get_guest_ptr(val_buf->bo, &ptr);
+ vmw_surface_dma_encode(srf, cmd, &ptr, bind);
+
+ vmw_fifo_commit(dev_priv, submit_size);
/*
- * Reserve- and validate the backup DMA bo.
+ * Create a fence object and fence the backup buffer.
*/
- INIT_LIST_HEAD(&val_list);
- val_buf.bo = ttm_bo_reference(srf->backup);
- list_add_tail(&val_buf.head, &val_list);
- ret = ttm_eu_reserve_buffers(&val_list);
- if (unlikely(ret != 0))
- goto out_no_reserve;
+ (void) vmw_execbuf_fence_commands(NULL, dev_priv,
+ &fence, NULL);
- ret = ttm_bo_validate(srf->backup, &vmw_srf_placement,
- true, false, false);
- if (unlikely(ret != 0))
- goto out_no_validate;
+ vmw_fence_single_bo(val_buf->bo, fence);
+
+ if (likely(fence != NULL))
+ vmw_fence_obj_unreference(&fence);
+
+ return 0;
+}
+
+/**
+ * vmw_legacy_srf_bind - Perform a legacy surface bind as part of the
+ * surface validation process.
+ *
+ * @res: Pointer to a struct vmw_res embedded in a struct
+ * vmw_surface.
+ * @val_buf: Pointer to a struct ttm_validate_buffer containing
+ * information about the backup buffer.
+ *
+ * This function will copy backup data to the surface if the
+ * backup buffer is dirty.
+ */
+static int vmw_legacy_srf_bind(struct vmw_resource *res,
+ struct ttm_validate_buffer *val_buf)
+{
+ if (!res->backup_dirty)
+ return 0;
+
+ return vmw_legacy_srf_dma(res, val_buf, true);
+}
+
+
+/**
+ * vmw_legacy_srf_unbind - Perform a legacy surface unbind as part of the
+ * surface eviction process.
+ *
+ * @res: Pointer to a struct vmw_res embedded in a struct
+ * vmw_surface.
+ * @val_buf: Pointer to a struct ttm_validate_buffer containing
+ * information about the backup buffer.
+ *
+ * This function will copy backup data from the surface.
+ */
+static int vmw_legacy_srf_unbind(struct vmw_resource *res,
+ bool readback,
+ struct ttm_validate_buffer *val_buf)
+{
+ if (unlikely(readback))
+ return vmw_legacy_srf_dma(res, val_buf, false);
+ return 0;
+}
+/**
+ * vmw_legacy_srf_destroy - Destroy a device surface as part of a
+ * resource eviction process.
+ *
+ * @res: Pointer to a struct vmw_res embedded in a struct
+ * vmw_surface.
+ */
+static int vmw_legacy_srf_destroy(struct vmw_resource *res)
+{
+ struct vmw_private *dev_priv = res->dev_priv;
+ uint32_t submit_size;
+ uint8_t *cmd;
+
+ BUG_ON(res->id == -1);
/*
* Encode the dma- and surface destroy commands.
*/
- submit_size = vmw_surface_dma_size(srf) + vmw_surface_destroy_size();
+ submit_size = vmw_surface_destroy_size();
cmd = vmw_fifo_reserve(dev_priv, submit_size);
if (unlikely(cmd == NULL)) {
DRM_ERROR("Failed reserving FIFO space for surface "
"eviction.\n");
- ret = -ENOMEM;
- goto out_no_fifo;
+ return -ENOMEM;
}
- vmw_bo_get_guest_ptr(srf->backup, &ptr);
- vmw_surface_dma_encode(srf, cmd, &ptr, false);
- cmd += vmw_surface_dma_size(srf);
vmw_surface_destroy_encode(res->id, cmd);
vmw_fifo_commit(dev_priv, submit_size);
* Surface memory usage accounting.
*/
- dev_priv->used_memory_size -= srf->backup_size;
-
- /*
- * Create a fence object and fence the DMA buffer.
- */
-
- (void) vmw_execbuf_fence_commands(NULL, dev_priv,
- &fence, NULL);
- ttm_eu_fence_buffer_objects(&val_list, fence);
- if (likely(fence != NULL))
- vmw_fence_obj_unreference(&fence);
- ttm_bo_unref(&val_buf.bo);
+ dev_priv->used_memory_size -= res->backup_size;
/*
* Release the surface ID.
vmw_resource_release_id(res);
return 0;
-
-out_no_fifo:
-out_no_validate:
- if (srf->backup)
- ttm_eu_backoff_reservation(&val_list);
-out_no_reserve:
- ttm_bo_unref(&val_buf.bo);
- ttm_bo_unref(&srf->backup);
- return ret;
}
/**
- * vmw_surface_validate - make a surface available to the device, evicting
- * other surfaces if needed.
- *
- * @dev_priv: Pointer to a device private struct.
- * @srf: Pointer to a struct vmw_surface.
+ * vmw_surface_init - initialize a struct vmw_surface
*
- * Try to validate a surface and if it fails due to limited device resources,
- * repeatedly try to evict other surfaces until the request can be
- * acommodated.
- *
- * May return errors if out of resources.
+ * @dev_priv: Pointer to a device private struct.
+ * @srf: Pointer to the struct vmw_surface to initialize.
+ * @res_free: Pointer to a resource destructor used to free
+ * the object.
*/
-int vmw_surface_validate(struct vmw_private *dev_priv,
- struct vmw_surface *srf)
+static int vmw_surface_init(struct vmw_private *dev_priv,
+ struct vmw_surface *srf,
+ void (*res_free) (struct vmw_resource *res))
{
int ret;
- struct vmw_surface *evict_srf;
-
- do {
- write_lock(&dev_priv->resource_lock);
- list_del_init(&srf->lru_head);
- write_unlock(&dev_priv->resource_lock);
-
- ret = vmw_surface_do_validate(dev_priv, srf);
- if (likely(ret != -EBUSY))
- break;
+ struct vmw_resource *res = &srf->res;
- write_lock(&dev_priv->resource_lock);
- if (list_empty(&dev_priv->surface_lru)) {
- DRM_ERROR("Out of device memory for surfaces.\n");
- ret = -EBUSY;
- write_unlock(&dev_priv->resource_lock);
- break;
- }
+ BUG_ON(res_free == NULL);
+ (void) vmw_3d_resource_inc(dev_priv, false);
+ ret = vmw_resource_init(dev_priv, res, true, res_free,
+ &vmw_legacy_surface_func);
- evict_srf = vmw_surface_reference
- (list_first_entry(&dev_priv->surface_lru,
- struct vmw_surface,
- lru_head));
- list_del_init(&evict_srf->lru_head);
+ if (unlikely(ret != 0)) {
+ vmw_3d_resource_dec(dev_priv, false);
+ res_free(res);
+ return ret;
+ }
- write_unlock(&dev_priv->resource_lock);
- (void) vmw_surface_evict(dev_priv, evict_srf);
-
- vmw_surface_unreference(&evict_srf);
-
- } while (1);
-
- if (unlikely(ret != 0 && srf->res.id != -1)) {
- write_lock(&dev_priv->resource_lock);
- list_add_tail(&srf->lru_head, &dev_priv->surface_lru);
- write_unlock(&dev_priv->resource_lock);
- }
+ /*
+ * The surface won't be visible to hardware until a
+ * surface validate.
+ */
+ vmw_resource_activate(res, vmw_hw_surface_destroy);
return ret;
}
-
/**
- * vmw_surface_remove_from_lists - Remove surface resources from lookup lists
+ * vmw_user_surface_base_to_res - TTM base object to resource converter for
+ * user visible surfaces
*
- * @res: Pointer to a struct vmw_resource embedded in a struct vmw_surface
+ * @base: Pointer to a TTM base object
*
- * As part of the resource destruction, remove the surface from any
- * lookup lists.
+ * Returns the struct vmw_resource embedded in a struct vmw_surface
+ * for the user-visible object identified by the TTM base object @base.
*/
-static void vmw_surface_remove_from_lists(struct vmw_resource *res)
+static struct vmw_resource *
+vmw_user_surface_base_to_res(struct ttm_base_object *base)
{
- struct vmw_surface *srf = container_of(res, struct vmw_surface, res);
-
- list_del_init(&srf->lru_head);
-}
-
-int vmw_surface_init(struct vmw_private *dev_priv,
- struct vmw_surface *srf,
- void (*res_free) (struct vmw_resource *res))
-{
- int ret;
- struct vmw_resource *res = &srf->res;
-
- BUG_ON(res_free == NULL);
- INIT_LIST_HEAD(&srf->lru_head);
- ret = vmw_resource_init(dev_priv, res, &dev_priv->surface_idr,
- VMW_RES_SURFACE, true, res_free,
- vmw_surface_remove_from_lists);
-
- if (unlikely(ret != 0))
- res_free(res);
-
- /*
- * The surface won't be visible to hardware until a
- * surface validate.
- */
-
- (void) vmw_3d_resource_inc(dev_priv, false);
- vmw_resource_activate(res, vmw_hw_surface_destroy);
- return ret;
+ return &(container_of(base, struct vmw_user_surface, base)->srf.res);
}
+/**
+ * vmw_user_surface_free - User visible surface resource destructor
+ *
+ * @res: A struct vmw_resource embedded in a struct vmw_surface.
+ */
static void vmw_user_surface_free(struct vmw_resource *res)
{
- struct vmw_surface *srf = container_of(res, struct vmw_surface, res);
+ struct vmw_surface *srf = vmw_res_to_srf(res);
struct vmw_user_surface *user_srf =
container_of(srf, struct vmw_user_surface, srf);
struct vmw_private *dev_priv = srf->res.dev_priv;
uint32_t size = user_srf->size;
- if (srf->backup)
- ttm_bo_unref(&srf->backup);
kfree(srf->offsets);
kfree(srf->sizes);
kfree(srf->snooper.image);
}
/**
- * vmw_resource_unreserve - unreserve resources previously reserved for
- * command submission.
+ * vmw_user_surface_free - User visible surface TTM base object destructor
*
- * @list_head: list of resources to unreserve.
+ * @p_base: Pointer to a pointer to a TTM base object
+ * embedded in a struct vmw_user_surface.
*
- * Currently only surfaces are considered, and unreserving a surface
- * means putting it back on the device's surface lru list,
- * so that it can be evicted if necessary.
- * This function traverses the resource list and
- * checks whether resources are surfaces, and in that case puts them back
- * on the device's surface LRU list.
+ * Drops the base object's reference on its resource, and the
+ * pointer pointed to by *p_base is set to NULL.
*/
-void vmw_resource_unreserve(struct list_head *list)
-{
- struct vmw_resource *res;
- struct vmw_surface *srf;
- rwlock_t *lock = NULL;
-
- list_for_each_entry(res, list, validate_head) {
-
- if (res->res_free != &vmw_surface_res_free &&
- res->res_free != &vmw_user_surface_free)
- continue;
-
- if (unlikely(lock == NULL)) {
- lock = &res->dev_priv->resource_lock;
- write_lock(lock);
- }
-
- srf = container_of(res, struct vmw_surface, res);
- list_del_init(&srf->lru_head);
- list_add_tail(&srf->lru_head, &res->dev_priv->surface_lru);
- }
-
- if (lock != NULL)
- write_unlock(lock);
-}
-
-/**
- * Helper function that looks either a surface or dmabuf.
- *
- * 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_dma_buffer **out_buf)
-{
- int ret;
-
- BUG_ON(*out_surf || *out_buf);
-
- ret = vmw_user_surface_lookup_handle(dev_priv, tfile, handle, out_surf);
- if (!ret)
- return 0;
-
- ret = vmw_user_dmabuf_lookup(tfile, handle, out_buf);
- return ret;
-}
-
-
-int vmw_user_surface_lookup_handle(struct vmw_private *dev_priv,
- struct ttm_object_file *tfile,
- uint32_t handle, struct vmw_surface **out)
-{
- struct vmw_resource *res;
- struct vmw_surface *srf;
- struct vmw_user_surface *user_srf;
- struct ttm_base_object *base;
- int ret = -EINVAL;
-
- base = ttm_base_object_lookup(tfile, handle);
- if (unlikely(base == NULL))
- return -EINVAL;
-
- if (unlikely(base->object_type != VMW_RES_SURFACE))
- goto out_bad_resource;
-
- user_srf = container_of(base, struct vmw_user_surface, base);
- srf = &user_srf->srf;
- res = &srf->res;
-
- read_lock(&dev_priv->resource_lock);
-
- if (!res->avail || res->res_free != &vmw_user_surface_free) {
- read_unlock(&dev_priv->resource_lock);
- goto out_bad_resource;
- }
-
- kref_get(&res->kref);
- read_unlock(&dev_priv->resource_lock);
-
- *out = srf;
- ret = 0;
-
-out_bad_resource:
- ttm_base_object_unref(&base);
-
- return ret;
-}
-
static void vmw_user_surface_base_release(struct ttm_base_object **p_base)
{
struct ttm_base_object *base = *p_base;
vmw_resource_unreference(&res);
}
+/**
+ * vmw_user_surface_destroy_ioctl - Ioctl function implementing
+ * the user surface destroy functionality.
+ *
+ * @dev: Pointer to a struct drm_device.
+ * @data: Pointer to data copied from / to user-space.
+ * @file_priv: Pointer to a drm file private structure.
+ */
int vmw_surface_destroy_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
return ttm_ref_object_base_unref(tfile, arg->sid, TTM_REF_USAGE);
}
+/**
+ * vmw_user_surface_define_ioctl - Ioctl function implementing
+ * the user surface define functionality.
+ *
+ * @dev: Pointer to a struct drm_device.
+ * @data: Pointer to data copied from / to user-space.
+ * @file_priv: Pointer to a drm file private structure.
+ */
int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
goto out_unlock;
}
- user_srf = kmalloc(sizeof(*user_srf), GFP_KERNEL);
+ user_srf = kzalloc(sizeof(*user_srf), GFP_KERNEL);
if (unlikely(user_srf == NULL)) {
ret = -ENOMEM;
goto out_no_user_srf;
srf->flags = req->flags;
srf->format = req->format;
srf->scanout = req->scanout;
- srf->backup = NULL;
memcpy(srf->mip_levels, req->mip_levels, sizeof(srf->mip_levels));
srf->num_sizes = num_sizes;
goto out_no_copy;
}
+ srf->base_size = *srf->sizes;
+ srf->autogen_filter = SVGA3D_TEX_FILTER_NONE;
+ srf->multisample_count = 1;
+
cur_bo_offset = 0;
cur_offset = srf->offsets;
cur_size = srf->sizes;
++cur_size;
}
}
- srf->backup_size = cur_bo_offset;
+ res->backup_size = cur_bo_offset;
if (srf->scanout &&
srf->num_sizes == 1 &&
}
rep->sid = user_srf->base.hash.key;
- if (rep->sid == SVGA3D_INVALID_ID)
- DRM_ERROR("Created bad Surface ID.\n");
-
vmw_resource_unreference(&res);
ttm_read_unlock(&vmaster->lock);
return ret;
}
+/**
+ * vmw_user_surface_define_ioctl - Ioctl function implementing
+ * the user surface reference functionality.
+ *
+ * @dev: Pointer to a struct drm_device.
+ * @data: Pointer to data copied from / to user-space.
+ * @file_priv: Pointer to a drm file private structure.
+ */
int vmw_surface_reference_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
return ret;
}
-int vmw_surface_check(struct vmw_private *dev_priv,
- struct ttm_object_file *tfile,
- uint32_t handle, int *id)
+/**
+ * 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_user_surface *user_srf;
-
- int ret = -EPERM;
+ struct vmw_resource *res;
+ int ret = -EINVAL;
base = ttm_base_object_lookup(tfile, handle);
if (unlikely(base == NULL))
return -EINVAL;
- if (unlikely(base->object_type != VMW_RES_SURFACE))
- goto out_bad_surface;
+ if (unlikely(base->object_type != converter->object_type))
+ goto out_bad_resource;
- user_srf = container_of(base, struct vmw_user_surface, base);
- *id = user_srf->srf.res.id;
- ret = 0;
+ res = converter->base_obj_to_res(base);
-out_bad_surface:
- /**
- * FIXME: May deadlock here when called from the
- * command parsing code.
- */
+ 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;
+
+out_bad_resource:
ttm_base_object_unref(&base);
+
+ return ret;
+}
+
+/**
+ * Helper function that looks either a surface or dmabuf.
+ *
+ * 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_dma_buffer **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_dmabuf_lookup(tfile, handle, out_buf);
return ret;
}
acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct vmw_dma_buffer));
memset(vmw_bo, 0, sizeof(*vmw_bo));
- INIT_LIST_HEAD(&vmw_bo->validate_list);
+ INIT_LIST_HEAD(&vmw_bo->res_list);
ret = ttm_bo_init(bdev, &vmw_bo->base, size,
ttm_bo_type_device, placement,
ttm_bo_unref(&bo);
}
+/**
+ * vmw_user_dmabuf_alloc - Allocate a user dma buffer
+ *
+ * @dev_priv: Pointer to a struct device private.
+ * @tfile: Pointer to a struct ttm_object_file on which to register the user
+ * object.
+ * @size: Size of the dma buffer.
+ * @shareable: Boolean whether the buffer is shareable with other open files.
+ * @handle: Pointer to where the handle value should be assigned.
+ * @p_dma_buf: Pointer to where the refcounted struct vmw_dma_buffer pointer
+ * should be assigned.
+ */
+int vmw_user_dmabuf_alloc(struct vmw_private *dev_priv,
+ struct ttm_object_file *tfile,
+ uint32_t size,
+ bool shareable,
+ uint32_t *handle,
+ struct vmw_dma_buffer **p_dma_buf)
+{
+ struct vmw_user_dma_buffer *user_bo;
+ struct ttm_buffer_object *tmp;
+ int ret;
+
+ user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL);
+ if (unlikely(user_bo == NULL)) {
+ DRM_ERROR("Failed to allocate a buffer.\n");
+ return -ENOMEM;
+ }
+
+ ret = vmw_dmabuf_init(dev_priv, &user_bo->dma, size,
+ &vmw_vram_sys_placement, true,
+ &vmw_user_dmabuf_destroy);
+ if (unlikely(ret != 0))
+ return ret;
+
+ tmp = ttm_bo_reference(&user_bo->dma.base);
+ ret = ttm_base_object_init(tfile,
+ &user_bo->base,
+ shareable,
+ ttm_buffer_type,
+ &vmw_user_dmabuf_release, NULL);
+ if (unlikely(ret != 0)) {
+ ttm_bo_unref(&tmp);
+ goto out_no_base_object;
+ }
+
+ *p_dma_buf = &user_bo->dma;
+ *handle = user_bo->base.hash.key;
+
+out_no_base_object:
+ return ret;
+}
+
int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
(union drm_vmw_alloc_dmabuf_arg *)data;
struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
struct drm_vmw_dmabuf_rep *rep = &arg->rep;
- struct vmw_user_dma_buffer *vmw_user_bo;
- struct ttm_buffer_object *tmp;
+ struct vmw_dma_buffer *dma_buf;
+ uint32_t handle;
struct vmw_master *vmaster = vmw_master(file_priv->master);
int ret;
- vmw_user_bo = kzalloc(sizeof(*vmw_user_bo), GFP_KERNEL);
- if (unlikely(vmw_user_bo == NULL))
- return -ENOMEM;
-
ret = ttm_read_lock(&vmaster->lock, true);
- if (unlikely(ret != 0)) {
- kfree(vmw_user_bo);
+ if (unlikely(ret != 0))
return ret;
- }
- ret = vmw_dmabuf_init(dev_priv, &vmw_user_bo->dma, req->size,
- &vmw_vram_sys_placement, true,
- &vmw_user_dmabuf_destroy);
+ ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile,
+ req->size, false, &handle, &dma_buf);
if (unlikely(ret != 0))
goto out_no_dmabuf;
- tmp = ttm_bo_reference(&vmw_user_bo->dma.base);
- ret = ttm_base_object_init(vmw_fpriv(file_priv)->tfile,
- &vmw_user_bo->base,
- false,
- ttm_buffer_type,
- &vmw_user_dmabuf_release, NULL);
- if (unlikely(ret != 0))
- goto out_no_base_object;
- else {
- rep->handle = vmw_user_bo->base.hash.key;
- rep->map_handle = vmw_user_bo->dma.base.addr_space_offset;
- rep->cur_gmr_id = vmw_user_bo->base.hash.key;
- rep->cur_gmr_offset = 0;
- }
+ rep->handle = handle;
+ rep->map_handle = dma_buf->base.addr_space_offset;
+ rep->cur_gmr_id = handle;
+ rep->cur_gmr_offset = 0;
+
+ vmw_dmabuf_unreference(&dma_buf);
-out_no_base_object:
- ttm_bo_unref(&tmp);
out_no_dmabuf:
ttm_read_unlock(&vmaster->lock);
TTM_REF_USAGE);
}
-uint32_t vmw_dmabuf_validate_node(struct ttm_buffer_object *bo,
- uint32_t cur_validate_node)
-{
- struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
-
- if (likely(vmw_bo->on_validate_list))
- return vmw_bo->cur_validate_node;
-
- vmw_bo->cur_validate_node = cur_validate_node;
- vmw_bo->on_validate_list = true;
-
- return cur_validate_node;
-}
-
-void vmw_dmabuf_validate_clear(struct ttm_buffer_object *bo)
-{
- struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
-
- vmw_bo->on_validate_list = false;
-}
-
int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile,
uint32_t handle, struct vmw_dma_buffer **out)
{
return 0;
}
+int vmw_user_dmabuf_reference(struct ttm_object_file *tfile,
+ struct vmw_dma_buffer *dma_buf)
+{
+ struct vmw_user_dma_buffer *user_bo;
+
+ if (dma_buf->base.destroy != vmw_user_dmabuf_destroy)
+ return -EINVAL;
+
+ user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, dma);
+ return ttm_ref_object_add(tfile, &user_bo->base, TTM_REF_USAGE, NULL);
+}
+
/*
* Stream management
*/
struct vmw_resource *res = &stream->res;
int ret;
- ret = vmw_resource_init(dev_priv, res, &dev_priv->stream_idr,
- VMW_RES_STREAM, false, res_free, NULL);
+ ret = vmw_resource_init(dev_priv, res, false, res_free,
+ &vmw_stream_func);
if (unlikely(ret != 0)) {
if (res_free == NULL)
return 0;
}
-/**
- * User-space context management:
- */
-
static void vmw_user_stream_free(struct vmw_resource *res)
{
struct vmw_user_stream *stream =
struct vmw_user_stream *stream;
struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
+ struct idr *idr = &dev_priv->res_idr[vmw_res_stream];
int ret = 0;
- res = vmw_resource_lookup(dev_priv, &dev_priv->stream_idr, arg->stream_id);
+
+ res = vmw_resource_lookup(dev_priv, idr, arg->stream_id);
if (unlikely(res == NULL))
return -EINVAL;
struct vmw_resource *res;
int ret;
- res = vmw_resource_lookup(dev_priv, &dev_priv->stream_idr, *inout_id);
+ res = vmw_resource_lookup(dev_priv, &dev_priv->res_idr[vmw_res_stream],
+ *inout_id);
if (unlikely(res == NULL))
return -EINVAL;
return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
handle, TTM_REF_USAGE);
}
+
+/**
+ * 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_dma_buffer *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 == NULL))
+ return -ENOMEM;
+
+ ret = vmw_dmabuf_init(res->dev_priv, backup, res->backup_size,
+ res->func->backup_placement,
+ interruptible,
+ &vmw_dmabuf_bo_free);
+ if (unlikely(ret != 0))
+ goto out_no_dmabuf;
+
+ res->backup = backup;
+
+out_no_dmabuf:
+ 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 && 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)
+ list_add_tail(&res->mob_head, &res->backup->res_list);
+ }
+
+ /*
+ * 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.
+ */
+ res->res_dirty = true;
+
+ 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.
+ * @new_backup: Pointer to new backup buffer if command submission
+ * switched.
+ * @new_backup_offset: New backup offset if @new_backup is !NULL.
+ *
+ * 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,
+ struct vmw_dma_buffer *new_backup,
+ unsigned long new_backup_offset)
+{
+ struct vmw_private *dev_priv = res->dev_priv;
+
+ if (!list_empty(&res->lru_head))
+ return;
+
+ if (new_backup && new_backup != res->backup) {
+
+ if (res->backup) {
+ BUG_ON(atomic_read(&res->backup->base.reserved) == 0);
+ list_del_init(&res->mob_head);
+ vmw_dmabuf_unreference(&res->backup);
+ }
+
+ res->backup = vmw_dmabuf_reference(new_backup);
+ BUG_ON(atomic_read(&new_backup->base.reserved) == 0);
+ list_add_tail(&res->mob_head, &new_backup->res_list);
+ }
+ if (new_backup)
+ res->backup_offset = new_backup_offset;
+
+ if (!res->func->may_evict)
+ return;
+
+ write_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);
+}
+
+/**
+ * vmw_resource_check_buffer - Check whether a backup buffer is needed
+ * for a resource and in that case, allocate
+ * one, reserve and validate it.
+ *
+ * @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.
+ */
+int vmw_resource_check_buffer(struct vmw_resource *res,
+ bool interruptible,
+ struct ttm_validate_buffer *val_buf)
+{
+ 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);
+ val_buf->bo = ttm_bo_reference(&res->backup->base);
+ list_add_tail(&val_buf->head, &val_list);
+ ret = ttm_eu_reserve_buffers(&val_list);
+ if (unlikely(ret != 0))
+ goto out_no_reserve;
+
+ if (res->func->needs_backup && list_empty(&res->mob_head))
+ return 0;
+
+ backup_dirty = res->backup_dirty;
+ ret = ttm_bo_validate(&res->backup->base,
+ res->func->backup_placement,
+ true, false, false);
+
+ if (unlikely(ret != 0))
+ goto out_no_validate;
+
+ return 0;
+
+out_no_validate:
+ ttm_eu_backoff_reservation(&val_list);
+out_no_reserve:
+ ttm_bo_unref(&val_buf->bo);
+ if (backup_dirty)
+ vmw_dmabuf_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 no_backup)
+{
+ struct vmw_private *dev_priv = res->dev_priv;
+ int ret;
+
+ write_lock(&dev_priv->resource_lock);
+ list_del_init(&res->lru_head);
+ write_unlock(&dev_priv->resource_lock);
+
+ if (res->func->needs_backup && res->backup == NULL &&
+ !no_backup) {
+ ret = vmw_resource_buf_alloc(res, true);
+ if (unlikely(ret != 0))
+ return ret;
+ }
+
+ return 0;
+}
+
+/**
+ * vmw_resource_backoff_reservation - Unreserve and unreference a
+ * backup buffer
+ *.
+ * @val_buf: Backup buffer information.
+ */
+void vmw_resource_backoff_reservation(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(&val_list);
+ ttm_bo_unref(&val_buf->bo);
+}
+
+/**
+ * vmw_resource_do_evict - Evict a resource, and transfer its data
+ * to a backup buffer.
+ *
+ * @res: The resource to evict.
+ */
+int vmw_resource_do_evict(struct vmw_resource *res)
+{
+ 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;
+ ret = vmw_resource_check_buffer(res, true, &val_buf);
+ if (unlikely(ret != 0))
+ return ret;
+
+ if (unlikely(func->unbind != NULL &&
+ (!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;
+ list_del_init(&res->mob_head);
+ }
+ ret = func->destroy(res);
+ res->backup_dirty = true;
+ res->res_dirty = false;
+out_no_unbind:
+ vmw_resource_backoff_reservation(&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.
+ *
+ * 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.
+ */
+int vmw_resource_validate(struct vmw_resource *res)
+{
+ 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;
+
+ if (likely(!res->func->may_evict))
+ return 0;
+
+ val_buf.bo = NULL;
+ if (res->backup)
+ val_buf.bo = &res->backup->base;
+ do {
+ ret = vmw_resource_do_validate(res, &val_buf);
+ if (likely(ret != -EBUSY))
+ break;
+
+ write_lock(&dev_priv->resource_lock);
+ if (list_empty(lru_list) || !res->func->may_evict) {
+ DRM_ERROR("Out of device device id entries "
+ "for %s.\n", res->func->type_name);
+ ret = -EBUSY;
+ write_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);
+
+ write_unlock(&dev_priv->resource_lock);
+ vmw_resource_do_evict(evict_res);
+ vmw_resource_unreference(&evict_res);
+ } while (1);
+
+ if (unlikely(ret != 0))
+ goto out_no_validate;
+ else if (!res->func->needs_backup && res->backup) {
+ list_del_init(&res->mob_head);
+ vmw_dmabuf_unreference(&res->backup);
+ }
+
+ return 0;
+
+out_no_validate:
+ return ret;
+}
+
+/**
+ * vmw_fence_single_bo - Utility function to fence a single TTM buffer
+ * object without unreserving it.
+ *
+ * @bo: Pointer to the struct ttm_buffer_object to fence.
+ * @fence: Pointer to the fence. If NULL, this function will
+ * insert a fence into the command stream..
+ *
+ * Contrary to the ttm_eu version of this function, it takes only
+ * a single buffer object instead of a list, and it also doesn't
+ * unreserve the buffer object, which needs to be done separately.
+ */
+void vmw_fence_single_bo(struct ttm_buffer_object *bo,
+ struct vmw_fence_obj *fence)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_driver *driver = bdev->driver;
+ struct vmw_fence_obj *old_fence_obj;
+ struct vmw_private *dev_priv =
+ container_of(bdev, struct vmw_private, bdev);
+
+ if (fence == NULL)
+ vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
+ else
+ driver->sync_obj_ref(fence);
+
+ spin_lock(&bdev->fence_lock);
+
+ old_fence_obj = bo->sync_obj;
+ bo->sync_obj = fence;
+
+ spin_unlock(&bdev->fence_lock);
+
+ if (old_fence_obj)
+ vmw_fence_obj_unreference(&old_fence_obj);
+}
+
+/**
+ * vmw_resource_move_notify - TTM move_notify_callback
+ *
+ * @bo: The TTM buffer object about to move.
+ * @mem: The truct ttm_mem_reg indicating to what memory
+ * region the move is taking place.
+ *
+ * For now does nothing.
+ */
+void vmw_resource_move_notify(struct ttm_buffer_object *bo,
+ struct ttm_mem_reg *mem)
+{
+}
+
+/**
+ * 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,
+ * 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;
+
+ do {
+ write_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);
+ write_unlock(&dev_priv->resource_lock);
+ vmw_resource_do_evict(evict_res);
+ vmw_resource_unreference(&evict_res);
+ } while (1);
+
+out_unlock:
+ write_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);
+}
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / blobdiff