diff options
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_resource.c')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_resource.c | 1298 |
1 files changed, 1298 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c new file mode 100644 index 0000000..407d7f9 --- /dev/null +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c @@ -0,0 +1,1298 @@ +/************************************************************************** + * + * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE + * USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +#include "vmwgfx_drv.h" +#include <drm/vmwgfx_drm.h> +#include <drm/ttm/ttm_object.h> +#include <drm/ttm/ttm_placement.h> +#include <drm/drmP.h> +#include "vmwgfx_resource_priv.h" + +struct vmw_user_dma_buffer { + struct ttm_base_object base; + struct vmw_dma_buffer dma; +}; + +struct vmw_bo_user_rep { + uint32_t handle; + uint64_t map_handle; +}; + +struct vmw_stream { + struct vmw_resource res; + uint32_t stream_id; +}; + +struct vmw_user_stream { + struct ttm_base_object base; + 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 +}; + +static inline struct vmw_dma_buffer * +vmw_dma_buffer(struct ttm_buffer_object *bo) +{ + return container_of(bo, struct vmw_dma_buffer, base); +} + +static inline struct vmw_user_dma_buffer * +vmw_user_dma_buffer(struct ttm_buffer_object *bo) +{ + struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); + return container_of(vmw_bo, struct vmw_user_dma_buffer, dma); +} + +struct vmw_resource *vmw_resource_reference(struct vmw_resource *res) +{ + kref_get(&res->kref); + return res; +} + + +/** + * 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]; + + write_lock(&dev_priv->resource_lock); + if (res->id != -1) + idr_remove(idr, res->id); + res->id = -1; + write_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]; + + res->avail = false; + 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 + kfree(res); + + write_lock(&dev_priv->resource_lock); + + if (id != -1) + idr_remove(idr, id); +} + +void vmw_resource_unreference(struct vmw_resource **p_res) +{ + struct vmw_resource *res = *p_res; + struct vmw_private *dev_priv = res->dev_priv; + + *p_res = NULL; + write_lock(&dev_priv->resource_lock); + kref_put(&res->kref, vmw_resource_release); + write_unlock(&dev_priv->resource_lock); +} + + +/** + * 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); + write_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); + 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->avail = false; + res->dev_priv = dev_priv; + 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(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); +} + +struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv, + struct idr *idr, int id) +{ + struct vmw_resource *res; + + read_lock(&dev_priv->resource_lock); + res = idr_find(idr, id); + if (res && res->avail) + kref_get(&res->kref); + else + res = NULL; + read_unlock(&dev_priv->resource_lock); + + if (unlikely(res == NULL)) + return NULL; + + return 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(base->object_type != converter->object_type)) + 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; + +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; +} + +/** + * Buffer management. + */ +void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo) +{ + struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); + + kfree(vmw_bo); +} + +int vmw_dmabuf_init(struct vmw_private *dev_priv, + struct vmw_dma_buffer *vmw_bo, + size_t size, struct ttm_placement *placement, + bool interruptible, + void (*bo_free) (struct ttm_buffer_object *bo)) +{ + struct ttm_bo_device *bdev = &dev_priv->bdev; + size_t acc_size; + int ret; + + BUG_ON(!bo_free); + + 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->res_list); + + ret = ttm_bo_init(bdev, &vmw_bo->base, size, + ttm_bo_type_device, placement, + 0, interruptible, + NULL, acc_size, NULL, bo_free); + return ret; +} + +static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo) +{ + struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo); + + ttm_base_object_kfree(vmw_user_bo, base); +} + +static void vmw_user_dmabuf_release(struct ttm_base_object **p_base) +{ + struct vmw_user_dma_buffer *vmw_user_bo; + struct ttm_base_object *base = *p_base; + struct ttm_buffer_object *bo; + + *p_base = NULL; + + if (unlikely(base == NULL)) + return; + + vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base); + bo = &vmw_user_bo->dma.base; + 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; +} + +/** + * vmw_user_dmabuf_verify_access - verify access permissions on this + * buffer object. + * + * @bo: Pointer to the buffer object being accessed + * @tfile: Identifying the caller. + */ +int vmw_user_dmabuf_verify_access(struct ttm_buffer_object *bo, + struct ttm_object_file *tfile) +{ + struct vmw_user_dma_buffer *vmw_user_bo; + + if (unlikely(bo->destroy != vmw_user_dmabuf_destroy)) + return -EPERM; + + vmw_user_bo = vmw_user_dma_buffer(bo); + return (vmw_user_bo->base.tfile == tfile || + vmw_user_bo->base.shareable) ? 0 : -EPERM; +} + +int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct vmw_private *dev_priv = vmw_priv(dev); + union drm_vmw_alloc_dmabuf_arg *arg = + (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_dma_buffer *dma_buf; + uint32_t handle; + struct vmw_master *vmaster = vmw_master(file_priv->master); + int ret; + + ret = ttm_read_lock(&vmaster->lock, true); + if (unlikely(ret != 0)) + return ret; + + 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; + + 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_dmabuf: + ttm_read_unlock(&vmaster->lock); + + return ret; +} + +int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_vmw_unref_dmabuf_arg *arg = + (struct drm_vmw_unref_dmabuf_arg *)data; + + return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, + arg->handle, + TTM_REF_USAGE); +} + +int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile, + uint32_t handle, struct vmw_dma_buffer **out) +{ + struct vmw_user_dma_buffer *vmw_user_bo; + struct ttm_base_object *base; + + base = ttm_base_object_lookup(tfile, handle); + if (unlikely(base == NULL)) { + printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", + (unsigned long)handle); + return -ESRCH; + } + + if (unlikely(base->object_type != ttm_buffer_type)) { + ttm_base_object_unref(&base); + printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", + (unsigned long)handle); + return -EINVAL; + } + + vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base); + (void)ttm_bo_reference(&vmw_user_bo->dma.base); + ttm_base_object_unref(&base); + *out = &vmw_user_bo->dma; + + 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 + */ + +static void vmw_stream_destroy(struct vmw_resource *res) +{ + struct vmw_private *dev_priv = res->dev_priv; + struct vmw_stream *stream; + int ret; + + DRM_INFO("%s: unref\n", __func__); + stream = container_of(res, struct vmw_stream, res); + + ret = vmw_overlay_unref(dev_priv, stream->stream_id); + WARN_ON(ret != 0); +} + +static int vmw_stream_init(struct vmw_private *dev_priv, + struct vmw_stream *stream, + void (*res_free) (struct vmw_resource *res)) +{ + struct vmw_resource *res = &stream->res; + int ret; + + ret = vmw_resource_init(dev_priv, res, false, res_free, + &vmw_stream_func); + + if (unlikely(ret != 0)) { + if (res_free == NULL) + kfree(stream); + else + res_free(&stream->res); + return ret; + } + + ret = vmw_overlay_claim(dev_priv, &stream->stream_id); + if (ret) { + vmw_resource_unreference(&res); + return ret; + } + + DRM_INFO("%s: claimed\n", __func__); + + vmw_resource_activate(&stream->res, vmw_stream_destroy); + return 0; +} + +static void vmw_user_stream_free(struct vmw_resource *res) +{ + struct vmw_user_stream *stream = + container_of(res, struct vmw_user_stream, stream.res); + struct vmw_private *dev_priv = res->dev_priv; + + ttm_base_object_kfree(stream, base); + ttm_mem_global_free(vmw_mem_glob(dev_priv), + vmw_user_stream_size); +} + +/** + * This function is called when user space has no more references on the + * base object. It releases the base-object's reference on the resource object. + */ + +static void vmw_user_stream_base_release(struct ttm_base_object **p_base) +{ + struct ttm_base_object *base = *p_base; + struct vmw_user_stream *stream = + container_of(base, struct vmw_user_stream, base); + struct vmw_resource *res = &stream->stream.res; + + *p_base = NULL; + vmw_resource_unreference(&res); +} + +int vmw_stream_unref_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_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, idr, arg->stream_id); + if (unlikely(res == NULL)) + return -EINVAL; + + if (res->res_free != &vmw_user_stream_free) { + ret = -EINVAL; + goto out; + } + + stream = container_of(res, struct vmw_user_stream, stream.res); + if (stream->base.tfile != tfile) { + ret = -EINVAL; + goto out; + } + + ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE); +out: + vmw_resource_unreference(&res); + return ret; +} + +int vmw_stream_claim_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct vmw_private *dev_priv = vmw_priv(dev); + struct vmw_user_stream *stream; + struct vmw_resource *res; + struct vmw_resource *tmp; + struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; + struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; + struct vmw_master *vmaster = vmw_master(file_priv->master); + int ret; + + /* + * Approximate idr memory usage with 128 bytes. It will be limited + * by maximum number_of streams anyway? + */ + + if (unlikely(vmw_user_stream_size == 0)) + vmw_user_stream_size = ttm_round_pot(sizeof(*stream)) + 128; + + ret = ttm_read_lock(&vmaster->lock, true); + if (unlikely(ret != 0)) + return ret; + + ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), + vmw_user_stream_size, + false, true); + if (unlikely(ret != 0)) { + if (ret != -ERESTARTSYS) + DRM_ERROR("Out of graphics memory for stream" + " creation.\n"); + goto out_unlock; + } + + + stream = kmalloc(sizeof(*stream), GFP_KERNEL); + if (unlikely(stream == NULL)) { + ttm_mem_global_free(vmw_mem_glob(dev_priv), + vmw_user_stream_size); + ret = -ENOMEM; + goto out_unlock; + } + + res = &stream->stream.res; + stream->base.shareable = false; + stream->base.tfile = NULL; + + /* + * From here on, the destructor takes over resource freeing. + */ + + ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free); + if (unlikely(ret != 0)) + goto out_unlock; + + tmp = vmw_resource_reference(res); + ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM, + &vmw_user_stream_base_release, NULL); + + if (unlikely(ret != 0)) { + vmw_resource_unreference(&tmp); + goto out_err; + } + + arg->stream_id = res->id; +out_err: + vmw_resource_unreference(&res); +out_unlock: + ttm_read_unlock(&vmaster->lock); + return ret; +} + +int vmw_user_stream_lookup(struct vmw_private *dev_priv, + struct ttm_object_file *tfile, + uint32_t *inout_id, struct vmw_resource **out) +{ + struct vmw_user_stream *stream; + struct vmw_resource *res; + int ret; + + res = vmw_resource_lookup(dev_priv, &dev_priv->res_idr[vmw_res_stream], + *inout_id); + if (unlikely(res == NULL)) + return -EINVAL; + + if (res->res_free != &vmw_user_stream_free) { + ret = -EINVAL; + goto err_ref; + } + + stream = container_of(res, struct vmw_user_stream, stream.res); + if (stream->base.tfile != tfile) { + ret = -EPERM; + goto err_ref; + } + + *inout_id = stream->stream.stream_id; + *out = res; + return 0; +err_ref: + vmw_resource_unreference(&res); + return ret; +} + + +int vmw_dumb_create(struct drm_file *file_priv, + struct drm_device *dev, + struct drm_mode_create_dumb *args) +{ + struct vmw_private *dev_priv = vmw_priv(dev); + struct vmw_master *vmaster = vmw_master(file_priv->master); + struct vmw_user_dma_buffer *vmw_user_bo; + struct ttm_buffer_object *tmp; + int ret; + + args->pitch = args->width * ((args->bpp + 7) / 8); + args->size = args->pitch * args->height; + + vmw_user_bo = kzalloc(sizeof(*vmw_user_bo), GFP_KERNEL); + if (vmw_user_bo == NULL) + return -ENOMEM; + + ret = ttm_read_lock(&vmaster->lock, true); + if (ret != 0) { + kfree(vmw_user_bo); + return ret; + } + + ret = vmw_dmabuf_init(dev_priv, &vmw_user_bo->dma, args->size, + &vmw_vram_sys_placement, true, + &vmw_user_dmabuf_destroy); + if (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; + + args->handle = vmw_user_bo->base.hash.key; + +out_no_base_object: + ttm_bo_unref(&tmp); +out_no_dmabuf: + ttm_read_unlock(&vmaster->lock); + return ret; +} + +int vmw_dumb_map_offset(struct drm_file *file_priv, + struct drm_device *dev, uint32_t handle, + uint64_t *offset) +{ + struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; + struct vmw_dma_buffer *out_buf; + int ret; + + ret = vmw_user_dmabuf_lookup(tfile, handle, &out_buf); + if (ret != 0) + return -EINVAL; + + *offset = out_buf->base.addr_space_offset; + vmw_dmabuf_unreference(&out_buf); + return 0; +} + +int vmw_dumb_destroy(struct drm_file *file_priv, + struct drm_device *dev, + uint32_t handle) +{ + 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(!ttm_bo_is_reserved(&res->backup->base)); + list_del_init(&res->mob_head); + vmw_dmabuf_unreference(&res->backup); + } + + res->backup = vmw_dmabuf_reference(new_backup); + BUG_ON(!ttm_bo_is_reserved(&new_backup->base)); + list_add_tail(&res->mob_head, &new_backup->res_list); + } + if (new_backup) + res->backup_offset = new_backup_offset; + + if (!res->func->may_evict || res->id == -1) + 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); + + 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); +} |