| /************************************************************************** |
| * |
| * Copyright © 2009-2015 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" |
| #include "vmwgfx_binding.h" |
| |
| #define VMW_RES_EVICT_ERR_COUNT 10 |
| |
| struct vmw_user_dma_buffer { |
| struct ttm_prime_object prime; |
| 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; |
| } |
| |
| 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]; |
| |
| 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]; |
| |
| write_lock(&dev_priv->resource_lock); |
| 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, NULL); |
| if (!list_empty(&res->mob_head) && |
| res->func->unbind != NULL) { |
| struct ttm_validate_buffer val_buf; |
| |
| val_buf.bo = bo; |
| val_buf.shared = false; |
| 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)) { |
| 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); |
| |
| write_lock(&dev_priv->resource_lock); |
| if (id != -1) |
| idr_remove(idr, id); |
| write_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); |
| 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); |
| INIT_LIST_HEAD(&res->binding_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); |
| } |
| |
| static 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_unless_zero(&res->kref)) |
| 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(ttm_base_object_type(base) != 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, NULL); |
| return ret; |
| } |
| |
| /** |
| * Buffer management. |
| */ |
| |
| /** |
| * vmw_dmabuf_acc_size - Calculate the pinned memory usage of buffers |
| * |
| * @dev_priv: Pointer to a struct vmw_private identifying the device. |
| * @size: The requested buffer size. |
| * @user: Whether this is an ordinary dma buffer or a user dma buffer. |
| */ |
| static size_t vmw_dmabuf_acc_size(struct vmw_private *dev_priv, size_t size, |
| bool user) |
| { |
| static size_t struct_size, user_struct_size; |
| size_t num_pages = PAGE_ALIGN(size) >> PAGE_SHIFT; |
| size_t page_array_size = ttm_round_pot(num_pages * sizeof(void *)); |
| |
| if (unlikely(struct_size == 0)) { |
| size_t backend_size = ttm_round_pot(vmw_tt_size); |
| |
| struct_size = backend_size + |
| ttm_round_pot(sizeof(struct vmw_dma_buffer)); |
| user_struct_size = backend_size + |
| ttm_round_pot(sizeof(struct vmw_user_dma_buffer)); |
| } |
| |
| if (dev_priv->map_mode == vmw_dma_alloc_coherent) |
| page_array_size += |
| ttm_round_pot(num_pages * sizeof(dma_addr_t)); |
| |
| return ((user) ? user_struct_size : struct_size) + |
| page_array_size; |
| } |
| |
| void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo) |
| { |
| struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); |
| |
| kfree(vmw_bo); |
| } |
| |
| 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_prime_object_kfree(vmw_user_bo, prime); |
| } |
| |
| 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; |
| bool user = (bo_free == &vmw_user_dmabuf_destroy); |
| |
| BUG_ON(!bo_free && (!user && (bo_free != vmw_dmabuf_bo_free))); |
| |
| acc_size = vmw_dmabuf_acc_size(dev_priv, size, user); |
| 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, NULL, bo_free); |
| return ret; |
| } |
| |
| 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, |
| prime.base); |
| bo = &vmw_user_bo->dma.base; |
| ttm_bo_unref(&bo); |
| } |
| |
| static void vmw_user_dmabuf_ref_obj_release(struct ttm_base_object *base, |
| enum ttm_ref_type ref_type) |
| { |
| struct vmw_user_dma_buffer *user_bo; |
| user_bo = container_of(base, struct vmw_user_dma_buffer, prime.base); |
| |
| switch (ref_type) { |
| case TTM_REF_SYNCCPU_WRITE: |
| ttm_bo_synccpu_write_release(&user_bo->dma.base); |
| break; |
| default: |
| BUG(); |
| } |
| } |
| |
| /** |
| * 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 ttm_base_object **p_base) |
| { |
| 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, |
| (dev_priv->has_mob) ? |
| &vmw_sys_placement : |
| &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_prime_object_init(tfile, |
| size, |
| &user_bo->prime, |
| shareable, |
| ttm_buffer_type, |
| &vmw_user_dmabuf_release, |
| &vmw_user_dmabuf_ref_obj_release); |
| if (unlikely(ret != 0)) { |
| ttm_bo_unref(&tmp); |
| goto out_no_base_object; |
| } |
| |
| *p_dma_buf = &user_bo->dma; |
| if (p_base) { |
| *p_base = &user_bo->prime.base; |
| kref_get(&(*p_base)->refcount); |
| } |
| *handle = user_bo->prime.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); |
| |
| /* Check that the caller has opened the object. */ |
| if (likely(ttm_ref_object_exists(tfile, &vmw_user_bo->prime.base))) |
| return 0; |
| |
| DRM_ERROR("Could not grant buffer access.\n"); |
| return -EPERM; |
| } |
| |
| /** |
| * vmw_user_dmabuf_synccpu_grab - Grab a struct vmw_user_dma_buffer for cpu |
| * access, idling previous GPU operations on the buffer and optionally |
| * blocking it for further command submissions. |
| * |
| * @user_bo: Pointer to the buffer object being grabbed for CPU access |
| * @tfile: Identifying the caller. |
| * @flags: Flags indicating how the grab should be performed. |
| * |
| * A blocking grab will be automatically released when @tfile is closed. |
| */ |
| static int vmw_user_dmabuf_synccpu_grab(struct vmw_user_dma_buffer *user_bo, |
| struct ttm_object_file *tfile, |
| uint32_t flags) |
| { |
| struct ttm_buffer_object *bo = &user_bo->dma.base; |
| bool existed; |
| int ret; |
| |
| if (flags & drm_vmw_synccpu_allow_cs) { |
| bool nonblock = !!(flags & drm_vmw_synccpu_dontblock); |
| long lret; |
| |
| lret = reservation_object_wait_timeout_rcu(bo->resv, true, true, |
| nonblock ? 0 : MAX_SCHEDULE_TIMEOUT); |
| if (!lret) |
| return -EBUSY; |
| else if (lret < 0) |
| return lret; |
| return 0; |
| } |
| |
| ret = ttm_bo_synccpu_write_grab |
| (bo, !!(flags & drm_vmw_synccpu_dontblock)); |
| if (unlikely(ret != 0)) |
| return ret; |
| |
| ret = ttm_ref_object_add(tfile, &user_bo->prime.base, |
| TTM_REF_SYNCCPU_WRITE, &existed); |
| if (ret != 0 || existed) |
| ttm_bo_synccpu_write_release(&user_bo->dma.base); |
| |
| return ret; |
| } |
| |
| /** |
| * vmw_user_dmabuf_synccpu_release - Release a previous grab for CPU access, |
| * and unblock command submission on the buffer if blocked. |
| * |
| * @handle: Handle identifying the buffer object. |
| * @tfile: Identifying the caller. |
| * @flags: Flags indicating the type of release. |
| */ |
| static int vmw_user_dmabuf_synccpu_release(uint32_t handle, |
| struct ttm_object_file *tfile, |
| uint32_t flags) |
| { |
| if (!(flags & drm_vmw_synccpu_allow_cs)) |
| return ttm_ref_object_base_unref(tfile, handle, |
| TTM_REF_SYNCCPU_WRITE); |
| |
| return 0; |
| } |
| |
| /** |
| * vmw_user_dmabuf_synccpu_release - ioctl function implementing the synccpu |
| * functionality. |
| * |
| * @dev: Identifies the drm device. |
| * @data: Pointer to the ioctl argument. |
| * @file_priv: Identifies the caller. |
| * |
| * This function checks the ioctl arguments for validity and calls the |
| * relevant synccpu functions. |
| */ |
| int vmw_user_dmabuf_synccpu_ioctl(struct drm_device *dev, void *data, |
| struct drm_file *file_priv) |
| { |
| struct drm_vmw_synccpu_arg *arg = |
| (struct drm_vmw_synccpu_arg *) data; |
| struct vmw_dma_buffer *dma_buf; |
| struct vmw_user_dma_buffer *user_bo; |
| struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
| struct ttm_base_object *buffer_base; |
| int ret; |
| |
| if ((arg->flags & (drm_vmw_synccpu_read | drm_vmw_synccpu_write)) == 0 |
| || (arg->flags & ~(drm_vmw_synccpu_read | drm_vmw_synccpu_write | |
| drm_vmw_synccpu_dontblock | |
| drm_vmw_synccpu_allow_cs)) != 0) { |
| DRM_ERROR("Illegal synccpu flags.\n"); |
| return -EINVAL; |
| } |
| |
| switch (arg->op) { |
| case drm_vmw_synccpu_grab: |
| ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &dma_buf, |
| &buffer_base); |
| if (unlikely(ret != 0)) |
| return ret; |
| |
| user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, |
| dma); |
| ret = vmw_user_dmabuf_synccpu_grab(user_bo, tfile, arg->flags); |
| vmw_dmabuf_unreference(&dma_buf); |
| ttm_base_object_unref(&buffer_base); |
| if (unlikely(ret != 0 && ret != -ERESTARTSYS && |
| ret != -EBUSY)) { |
| DRM_ERROR("Failed synccpu grab on handle 0x%08x.\n", |
| (unsigned int) arg->handle); |
| return ret; |
| } |
| break; |
| case drm_vmw_synccpu_release: |
| ret = vmw_user_dmabuf_synccpu_release(arg->handle, tfile, |
| arg->flags); |
| if (unlikely(ret != 0)) { |
| DRM_ERROR("Failed synccpu release on handle 0x%08x.\n", |
| (unsigned int) arg->handle); |
| return ret; |
| } |
| break; |
| default: |
| DRM_ERROR("Invalid synccpu operation.\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| 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; |
| int ret; |
| |
| ret = ttm_read_lock(&dev_priv->reservation_sem, 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, |
| NULL); |
| if (unlikely(ret != 0)) |
| goto out_no_dmabuf; |
| |
| rep->handle = handle; |
| rep->map_handle = drm_vma_node_offset_addr(&dma_buf->base.vma_node); |
| rep->cur_gmr_id = handle; |
| rep->cur_gmr_offset = 0; |
| |
| vmw_dmabuf_unreference(&dma_buf); |
| |
| out_no_dmabuf: |
| ttm_read_unlock(&dev_priv->reservation_sem); |
| |
| 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 ttm_base_object **p_base) |
| { |
| 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(ttm_base_object_type(base) != 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, |
| prime.base); |
| (void)ttm_bo_reference(&vmw_user_bo->dma.base); |
| if (p_base) |
| *p_base = base; |
| else |
| 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, |
| uint32_t *handle) |
| { |
| 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); |
| |
| *handle = user_bo->prime.base.hash.key; |
| return ttm_ref_object_add(tfile, &user_bo->prime.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; |
| 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(&dev_priv->reservation_sem, true); |
| if (unlikely(ret != 0)) |
| return ret; |
| |
| ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), |
| vmw_user_stream_size, |
| false, true); |
| ttm_read_unlock(&dev_priv->reservation_sem); |
| if (unlikely(ret != 0)) { |
| if (ret != -ERESTARTSYS) |
| DRM_ERROR("Out of graphics memory for stream" |
| " creation.\n"); |
| |
| goto out_ret; |
| } |
| |
| 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_ret; |
| } |
| |
| 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_ret; |
| |
| 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_ret: |
| 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; |
| } |
| |
| |
| /** |
| * vmw_dumb_create - Create a dumb kms buffer |
| * |
| * @file_priv: Pointer to a struct drm_file identifying the caller. |
| * @dev: Pointer to the drm device. |
| * @args: Pointer to a struct drm_mode_create_dumb structure |
| * |
| * This is a driver callback for the core drm create_dumb functionality. |
| * Note that this is very similar to the vmw_dmabuf_alloc ioctl, except |
| * that the arguments have a different format. |
| */ |
| 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_dma_buffer *dma_buf; |
| int ret; |
| |
| args->pitch = args->width * ((args->bpp + 7) / 8); |
| args->size = args->pitch * args->height; |
| |
| ret = ttm_read_lock(&dev_priv->reservation_sem, true); |
| if (unlikely(ret != 0)) |
| return ret; |
| |
| ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile, |
| args->size, false, &args->handle, |
| &dma_buf, NULL); |
| if (unlikely(ret != 0)) |
| goto out_no_dmabuf; |
| |
| vmw_dmabuf_unreference(&dma_buf); |
| out_no_dmabuf: |
| ttm_read_unlock(&dev_priv->reservation_sem); |
| return ret; |
| } |
| |
| /** |
| * vmw_dumb_map_offset - Return the address space offset of a dumb buffer |
| * |
| * @file_priv: Pointer to a struct drm_file identifying the caller. |
| * @dev: Pointer to the drm device. |
| * @handle: Handle identifying the dumb buffer. |
| * @offset: The address space offset returned. |
| * |
| * This is a driver callback for the core drm dumb_map_offset functionality. |
| */ |
| 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, NULL); |
| if (ret != 0) |
| return -EINVAL; |
| |
| *offset = drm_vma_node_offset_addr(&out_buf->base.vma_node); |
| vmw_dmabuf_unreference(&out_buf); |
| return 0; |
| } |
| |
| /** |
| * vmw_dumb_destroy - Destroy a dumb boffer |
| * |
| * @file_priv: Pointer to a struct drm_file identifying the caller. |
| * @dev: Pointer to the drm device. |
| * @handle: Handle identifying the dumb buffer. |
| * |
| * This is a driver callback for the core drm dumb_destroy functionality. |
| */ |
| 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. |
| * @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 switch_backup, |
| 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 (switch_backup && new_backup != res->backup) { |
| if (res->backup) { |
| lockdep_assert_held(&res->backup->base.resv->lock.base); |
| list_del_init(&res->mob_head); |
| vmw_dmabuf_unreference(&res->backup); |
| } |
| |
| if (new_backup) { |
| res->backup = vmw_dmabuf_reference(new_backup); |
| lockdep_assert_held(&new_backup->base.resv->lock.base); |
| list_add_tail(&res->mob_head, &new_backup->res_list); |
| } else { |
| res->backup = NULL; |
| } |
| } |
| if (switch_backup) |
| res->backup_offset = new_backup_offset; |
| |
| if (!res->func->may_evict || res->id == -1 || res->pin_count) |
| 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. |
| */ |
| static 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); |
| val_buf->shared = false; |
| list_add_tail(&val_buf->head, &val_list); |
| ret = ttm_eu_reserve_buffers(NULL, &val_list, interruptible, NULL); |
| 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(NULL, &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 interruptible, |
| 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, 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 |
| *. |
| * @val_buf: Backup buffer information. |
| */ |
| static 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(NULL, &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. |
| * @interruptible: Whether to wait interruptible. |
| */ |
| static int vmw_resource_do_evict(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.shared = false; |
| ret = vmw_resource_check_buffer(res, interruptible, &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; |
| unsigned err_count = 0; |
| |
| if (!res->func->create) |
| return 0; |
| |
| val_buf.bo = NULL; |
| val_buf.shared = false; |
| 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 resources " |
| "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); |
| |
| ret = vmw_resource_do_evict(evict_res, true); |
| if (unlikely(ret != 0)) { |
| write_lock(&dev_priv->resource_lock); |
| list_add_tail(&evict_res->lru_head, lru_list); |
| write_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) { |
| 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 vmw_private *dev_priv = |
| container_of(bdev, struct vmw_private, bdev); |
| |
| if (fence == NULL) { |
| vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL); |
| reservation_object_add_excl_fence(bo->resv, &fence->base); |
| fence_put(&fence->base); |
| } else |
| reservation_object_add_excl_fence(bo->resv, &fence->base); |
| } |
| |
| /** |
| * vmw_resource_move_notify - TTM move_notify_callback |
| * |
| * @bo: The TTM buffer object about to move. |
| * @mem: The struct ttm_mem_reg indicating to what memory |
| * region the move is taking place. |
| * |
| * Evicts the Guest Backed hardware resource if the backup |
| * buffer is being moved out of MOB memory. |
| * Note that this function should not race with the resource |
| * validation code as long as it accesses only members of struct |
| * resource that remain static while bo::res is !NULL and |
| * while we have @bo reserved. struct resource::backup is *not* a |
| * static member. The resource validation code will take care |
| * to set @bo::res to NULL, while having @bo reserved when the |
| * buffer is no longer bound to the resource, so @bo:res can be |
| * used to determine whether there is a need to unbind and whether |
| * it is safe to unbind. |
| */ |
| void vmw_resource_move_notify(struct ttm_buffer_object *bo, |
| struct ttm_mem_reg *mem) |
| { |
| struct vmw_dma_buffer *dma_buf; |
| |
| if (mem == NULL) |
| return; |
| |
| if (bo->destroy != vmw_dmabuf_bo_free && |
| bo->destroy != vmw_user_dmabuf_destroy) |
| return; |
| |
| dma_buf = container_of(bo, struct vmw_dma_buffer, base); |
| |
| if (mem->mem_type != VMW_PL_MOB) { |
| struct vmw_resource *res, *n; |
| struct ttm_validate_buffer val_buf; |
| |
| val_buf.bo = bo; |
| val_buf.shared = false; |
| |
| list_for_each_entry_safe(res, n, &dma_buf->res_list, mob_head) { |
| |
| if (unlikely(res->func->unbind == NULL)) |
| continue; |
| |
| (void) res->func->unbind(res, true, &val_buf); |
| res->backup_dirty = true; |
| res->res_dirty = false; |
| list_del_init(&res->mob_head); |
| } |
| |
| (void) ttm_bo_wait(bo, 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_dma_buffer *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)) { |
| DRM_ERROR("Failed reserving FIFO space for " |
| "query MOB read back.\n"); |
| 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_dma_buffer *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_dma_buffer, 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_fence_single_bo(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; |
| |
| 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); |
| |
| ret = vmw_resource_do_evict(evict_res, false); |
| if (unlikely(ret != 0)) { |
| write_lock(&dev_priv->resource_lock); |
| list_add_tail(&evict_res->lru_head, lru_list); |
| write_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: |
| 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); |
| } |
| |
| /** |
| * 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 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_dma_buffer *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, |
| interruptible, false); |
| 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); |
| if (vbo) |
| ttm_bo_unreserve(&vbo->base); |
| if (ret) |
| goto out_no_validate; |
| } |
| res->pin_count++; |
| |
| out_no_validate: |
| vmw_resource_unreserve(res, 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; |
| |
| 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_dma_buffer *vbo = res->backup; |
| |
| ttm_bo_reserve(&vbo->base, false, false, NULL); |
| vmw_bo_pin_reserved(vbo, false); |
| ttm_bo_unreserve(&vbo->base); |
| } |
| |
| vmw_resource_unreserve(res, 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; |
| } |