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- // SPDX-License-Identifier: GPL-2.0 OR MIT
- /**************************************************************************
- *
- * Copyright © 2011-2018 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 <drm/ttm/ttm_placement.h>
- #include <drm/drmP.h>
- #include "vmwgfx_drv.h"
- #include "drm/ttm/ttm_object.h"
- /**
- * struct vmw_user_buffer_object - User-space-visible buffer object
- *
- * @prime: The prime object providing user visibility.
- * @vbo: The struct vmw_buffer_object
- */
- struct vmw_user_buffer_object {
- struct ttm_prime_object prime;
- struct vmw_buffer_object vbo;
- };
- /**
- * vmw_buffer_object - Convert a struct ttm_buffer_object to a struct
- * vmw_buffer_object.
- *
- * @bo: Pointer to the TTM buffer object.
- * Return: Pointer to the struct vmw_buffer_object embedding the
- * TTM buffer object.
- */
- static struct vmw_buffer_object *
- vmw_buffer_object(struct ttm_buffer_object *bo)
- {
- return container_of(bo, struct vmw_buffer_object, base);
- }
- /**
- * vmw_user_buffer_object - Convert a struct ttm_buffer_object to a struct
- * vmw_user_buffer_object.
- *
- * @bo: Pointer to the TTM buffer object.
- * Return: Pointer to the struct vmw_buffer_object embedding the TTM buffer
- * object.
- */
- static struct vmw_user_buffer_object *
- vmw_user_buffer_object(struct ttm_buffer_object *bo)
- {
- struct vmw_buffer_object *vmw_bo = vmw_buffer_object(bo);
- return container_of(vmw_bo, struct vmw_user_buffer_object, vbo);
- }
- /**
- * vmw_bo_pin_in_placement - Validate a buffer to placement.
- *
- * @dev_priv: Driver private.
- * @buf: DMA buffer to move.
- * @placement: The placement to pin it.
- * @interruptible: Use interruptible wait.
- * Return: Zero on success, Negative error code on failure. In particular
- * -ERESTARTSYS if interrupted by a signal
- */
- int vmw_bo_pin_in_placement(struct vmw_private *dev_priv,
- struct vmw_buffer_object *buf,
- struct ttm_placement *placement,
- bool interruptible)
- {
- struct ttm_operation_ctx ctx = {interruptible, false };
- struct ttm_buffer_object *bo = &buf->base;
- int ret;
- uint32_t new_flags;
- ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible);
- if (unlikely(ret != 0))
- return ret;
- vmw_execbuf_release_pinned_bo(dev_priv);
- ret = ttm_bo_reserve(bo, interruptible, false, NULL);
- if (unlikely(ret != 0))
- goto err;
- if (buf->pin_count > 0)
- ret = ttm_bo_mem_compat(placement, &bo->mem,
- &new_flags) == true ? 0 : -EINVAL;
- else
- ret = ttm_bo_validate(bo, placement, &ctx);
- if (!ret)
- vmw_bo_pin_reserved(buf, true);
- ttm_bo_unreserve(bo);
- err:
- ttm_write_unlock(&dev_priv->reservation_sem);
- return ret;
- }
- /**
- * vmw_bo_pin_in_vram_or_gmr - Move a buffer to vram or gmr.
- *
- * This function takes the reservation_sem in write mode.
- * Flushes and unpins the query bo to avoid failures.
- *
- * @dev_priv: Driver private.
- * @buf: DMA buffer to move.
- * @pin: Pin buffer if true.
- * @interruptible: Use interruptible wait.
- * Return: Zero on success, Negative error code on failure. In particular
- * -ERESTARTSYS if interrupted by a signal
- */
- int vmw_bo_pin_in_vram_or_gmr(struct vmw_private *dev_priv,
- struct vmw_buffer_object *buf,
- bool interruptible)
- {
- struct ttm_operation_ctx ctx = {interruptible, false };
- struct ttm_buffer_object *bo = &buf->base;
- int ret;
- uint32_t new_flags;
- ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible);
- if (unlikely(ret != 0))
- return ret;
- vmw_execbuf_release_pinned_bo(dev_priv);
- ret = ttm_bo_reserve(bo, interruptible, false, NULL);
- if (unlikely(ret != 0))
- goto err;
- if (buf->pin_count > 0) {
- ret = ttm_bo_mem_compat(&vmw_vram_gmr_placement, &bo->mem,
- &new_flags) == true ? 0 : -EINVAL;
- goto out_unreserve;
- }
- ret = ttm_bo_validate(bo, &vmw_vram_gmr_placement, &ctx);
- if (likely(ret == 0) || ret == -ERESTARTSYS)
- goto out_unreserve;
- ret = ttm_bo_validate(bo, &vmw_vram_placement, &ctx);
- out_unreserve:
- if (!ret)
- vmw_bo_pin_reserved(buf, true);
- ttm_bo_unreserve(bo);
- err:
- ttm_write_unlock(&dev_priv->reservation_sem);
- return ret;
- }
- /**
- * vmw_bo_pin_in_vram - Move a buffer to vram.
- *
- * This function takes the reservation_sem in write mode.
- * Flushes and unpins the query bo to avoid failures.
- *
- * @dev_priv: Driver private.
- * @buf: DMA buffer to move.
- * @interruptible: Use interruptible wait.
- * Return: Zero on success, Negative error code on failure. In particular
- * -ERESTARTSYS if interrupted by a signal
- */
- int vmw_bo_pin_in_vram(struct vmw_private *dev_priv,
- struct vmw_buffer_object *buf,
- bool interruptible)
- {
- return vmw_bo_pin_in_placement(dev_priv, buf, &vmw_vram_placement,
- interruptible);
- }
- /**
- * vmw_bo_pin_in_start_of_vram - Move a buffer to start of vram.
- *
- * This function takes the reservation_sem in write mode.
- * Flushes and unpins the query bo to avoid failures.
- *
- * @dev_priv: Driver private.
- * @buf: DMA buffer to pin.
- * @interruptible: Use interruptible wait.
- * Return: Zero on success, Negative error code on failure. In particular
- * -ERESTARTSYS if interrupted by a signal
- */
- int vmw_bo_pin_in_start_of_vram(struct vmw_private *dev_priv,
- struct vmw_buffer_object *buf,
- bool interruptible)
- {
- struct ttm_operation_ctx ctx = {interruptible, false };
- struct ttm_buffer_object *bo = &buf->base;
- struct ttm_placement placement;
- struct ttm_place place;
- int ret = 0;
- uint32_t new_flags;
- place = vmw_vram_placement.placement[0];
- place.lpfn = bo->num_pages;
- placement.num_placement = 1;
- placement.placement = &place;
- placement.num_busy_placement = 1;
- placement.busy_placement = &place;
- ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible);
- if (unlikely(ret != 0))
- return ret;
- vmw_execbuf_release_pinned_bo(dev_priv);
- ret = ttm_bo_reserve(bo, interruptible, false, NULL);
- if (unlikely(ret != 0))
- goto err_unlock;
- /*
- * Is this buffer already in vram but not at the start of it?
- * In that case, evict it first because TTM isn't good at handling
- * that situation.
- */
- if (bo->mem.mem_type == TTM_PL_VRAM &&
- bo->mem.start < bo->num_pages &&
- bo->mem.start > 0 &&
- buf->pin_count == 0) {
- ctx.interruptible = false;
- (void) ttm_bo_validate(bo, &vmw_sys_placement, &ctx);
- }
- if (buf->pin_count > 0)
- ret = ttm_bo_mem_compat(&placement, &bo->mem,
- &new_flags) == true ? 0 : -EINVAL;
- else
- ret = ttm_bo_validate(bo, &placement, &ctx);
- /* For some reason we didn't end up at the start of vram */
- WARN_ON(ret == 0 && bo->offset != 0);
- if (!ret)
- vmw_bo_pin_reserved(buf, true);
- ttm_bo_unreserve(bo);
- err_unlock:
- ttm_write_unlock(&dev_priv->reservation_sem);
- return ret;
- }
- /**
- * vmw_bo_unpin - Unpin the buffer given buffer, does not move the buffer.
- *
- * This function takes the reservation_sem in write mode.
- *
- * @dev_priv: Driver private.
- * @buf: DMA buffer to unpin.
- * @interruptible: Use interruptible wait.
- * Return: Zero on success, Negative error code on failure. In particular
- * -ERESTARTSYS if interrupted by a signal
- */
- int vmw_bo_unpin(struct vmw_private *dev_priv,
- struct vmw_buffer_object *buf,
- bool interruptible)
- {
- struct ttm_buffer_object *bo = &buf->base;
- int ret;
- ret = ttm_read_lock(&dev_priv->reservation_sem, interruptible);
- if (unlikely(ret != 0))
- return ret;
- ret = ttm_bo_reserve(bo, interruptible, false, NULL);
- if (unlikely(ret != 0))
- goto err;
- vmw_bo_pin_reserved(buf, false);
- ttm_bo_unreserve(bo);
- err:
- ttm_read_unlock(&dev_priv->reservation_sem);
- return ret;
- }
- /**
- * vmw_bo_get_guest_ptr - Get the guest ptr representing the current placement
- * of a buffer.
- *
- * @bo: Pointer to a struct ttm_buffer_object. Must be pinned or reserved.
- * @ptr: SVGAGuestPtr returning the result.
- */
- void vmw_bo_get_guest_ptr(const struct ttm_buffer_object *bo,
- SVGAGuestPtr *ptr)
- {
- if (bo->mem.mem_type == TTM_PL_VRAM) {
- ptr->gmrId = SVGA_GMR_FRAMEBUFFER;
- ptr->offset = bo->offset;
- } else {
- ptr->gmrId = bo->mem.start;
- ptr->offset = 0;
- }
- }
- /**
- * vmw_bo_pin_reserved - Pin or unpin a buffer object without moving it.
- *
- * @vbo: The buffer object. Must be reserved.
- * @pin: Whether to pin or unpin.
- *
- */
- void vmw_bo_pin_reserved(struct vmw_buffer_object *vbo, bool pin)
- {
- struct ttm_operation_ctx ctx = { false, true };
- struct ttm_place pl;
- struct ttm_placement placement;
- struct ttm_buffer_object *bo = &vbo->base;
- uint32_t old_mem_type = bo->mem.mem_type;
- int ret;
- lockdep_assert_held(&bo->resv->lock.base);
- if (pin) {
- if (vbo->pin_count++ > 0)
- return;
- } else {
- WARN_ON(vbo->pin_count <= 0);
- if (--vbo->pin_count > 0)
- return;
- }
- pl.fpfn = 0;
- pl.lpfn = 0;
- pl.flags = TTM_PL_FLAG_VRAM | VMW_PL_FLAG_GMR | VMW_PL_FLAG_MOB
- | TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED;
- if (pin)
- pl.flags |= TTM_PL_FLAG_NO_EVICT;
- memset(&placement, 0, sizeof(placement));
- placement.num_placement = 1;
- placement.placement = &pl;
- ret = ttm_bo_validate(bo, &placement, &ctx);
- BUG_ON(ret != 0 || bo->mem.mem_type != old_mem_type);
- }
- /**
- * vmw_bo_map_and_cache - Map a buffer object and cache the map
- *
- * @vbo: The buffer object to map
- * Return: A kernel virtual address or NULL if mapping failed.
- *
- * This function maps a buffer object into the kernel address space, or
- * returns the virtual kernel address of an already existing map. The virtual
- * address remains valid as long as the buffer object is pinned or reserved.
- * The cached map is torn down on either
- * 1) Buffer object move
- * 2) Buffer object swapout
- * 3) Buffer object destruction
- *
- */
- void *vmw_bo_map_and_cache(struct vmw_buffer_object *vbo)
- {
- struct ttm_buffer_object *bo = &vbo->base;
- bool not_used;
- void *virtual;
- int ret;
- virtual = ttm_kmap_obj_virtual(&vbo->map, ¬_used);
- if (virtual)
- return virtual;
- ret = ttm_bo_kmap(bo, 0, bo->num_pages, &vbo->map);
- if (ret)
- DRM_ERROR("Buffer object map failed: %d.\n", ret);
- return ttm_kmap_obj_virtual(&vbo->map, ¬_used);
- }
- /**
- * vmw_bo_unmap - Tear down a cached buffer object map.
- *
- * @vbo: The buffer object whose map we are tearing down.
- *
- * This function tears down a cached map set up using
- * vmw_buffer_object_map_and_cache().
- */
- void vmw_bo_unmap(struct vmw_buffer_object *vbo)
- {
- if (vbo->map.bo == NULL)
- return;
- ttm_bo_kunmap(&vbo->map);
- }
- /**
- * vmw_bo_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_bo_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_buffer_object));
- user_struct_size = backend_size +
- ttm_round_pot(sizeof(struct vmw_user_buffer_object));
- }
- 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;
- }
- /**
- * vmw_bo_bo_free - vmw buffer object destructor
- *
- * @bo: Pointer to the embedded struct ttm_buffer_object
- */
- void vmw_bo_bo_free(struct ttm_buffer_object *bo)
- {
- struct vmw_buffer_object *vmw_bo = vmw_buffer_object(bo);
- vmw_bo_unmap(vmw_bo);
- kfree(vmw_bo);
- }
- /**
- * vmw_user_bo_destroy - vmw buffer object destructor
- *
- * @bo: Pointer to the embedded struct ttm_buffer_object
- */
- static void vmw_user_bo_destroy(struct ttm_buffer_object *bo)
- {
- struct vmw_user_buffer_object *vmw_user_bo = vmw_user_buffer_object(bo);
- vmw_bo_unmap(&vmw_user_bo->vbo);
- ttm_prime_object_kfree(vmw_user_bo, prime);
- }
- /**
- * vmw_bo_init - Initialize a vmw buffer object
- *
- * @dev_priv: Pointer to the device private struct
- * @vmw_bo: Pointer to the struct vmw_buffer_object to initialize.
- * @size: Buffer object size in bytes.
- * @placement: Initial placement.
- * @interruptible: Whether waits should be performed interruptible.
- * @bo_free: The buffer object destructor.
- * Returns: Zero on success, negative error code on error.
- *
- * Note that on error, the code will free the buffer object.
- */
- int vmw_bo_init(struct vmw_private *dev_priv,
- struct vmw_buffer_object *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_bo_destroy);
- WARN_ON_ONCE(!bo_free && (!user && (bo_free != vmw_bo_bo_free)));
- acc_size = vmw_bo_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, acc_size,
- NULL, NULL, bo_free);
- return ret;
- }
- /**
- * vmw_user_bo_release - TTM reference base object release callback for
- * vmw user buffer objects
- *
- * @p_base: The TTM base object pointer about to be unreferenced.
- *
- * Clears the TTM base object pointer and drops the reference the
- * base object has on the underlying struct vmw_buffer_object.
- */
- static void vmw_user_bo_release(struct ttm_base_object **p_base)
- {
- struct vmw_user_buffer_object *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_buffer_object,
- prime.base);
- bo = &vmw_user_bo->vbo.base;
- ttm_bo_unref(&bo);
- }
- /**
- * vmw_user_bo_ref_obj-release - TTM synccpu reference object release callback
- * for vmw user buffer objects
- *
- * @base: Pointer to the TTM base object
- * @ref_type: Reference type of the reference reaching zero.
- *
- * Called when user-space drops its last synccpu reference on the buffer
- * object, Either explicitly or as part of a cleanup file close.
- */
- static void vmw_user_bo_ref_obj_release(struct ttm_base_object *base,
- enum ttm_ref_type ref_type)
- {
- struct vmw_user_buffer_object *user_bo;
- user_bo = container_of(base, struct vmw_user_buffer_object, prime.base);
- switch (ref_type) {
- case TTM_REF_SYNCCPU_WRITE:
- ttm_bo_synccpu_write_release(&user_bo->vbo.base);
- break;
- default:
- WARN_ONCE(true, "Undefined buffer object reference release.\n");
- }
- }
- /**
- * vmw_user_bo_alloc - Allocate a user buffer object
- *
- * @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 buffer object.
- * @shareable: Boolean whether the buffer is shareable with other open files.
- * @handle: Pointer to where the handle value should be assigned.
- * @p_vbo: Pointer to where the refcounted struct vmw_buffer_object pointer
- * should be assigned.
- * Return: Zero on success, negative error code on error.
- */
- int vmw_user_bo_alloc(struct vmw_private *dev_priv,
- struct ttm_object_file *tfile,
- uint32_t size,
- bool shareable,
- uint32_t *handle,
- struct vmw_buffer_object **p_vbo,
- struct ttm_base_object **p_base)
- {
- struct vmw_user_buffer_object *user_bo;
- struct ttm_buffer_object *tmp;
- int ret;
- user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL);
- if (unlikely(!user_bo)) {
- DRM_ERROR("Failed to allocate a buffer.\n");
- return -ENOMEM;
- }
- ret = vmw_bo_init(dev_priv, &user_bo->vbo, size,
- (dev_priv->has_mob) ?
- &vmw_sys_placement :
- &vmw_vram_sys_placement, true,
- &vmw_user_bo_destroy);
- if (unlikely(ret != 0))
- return ret;
- tmp = ttm_bo_reference(&user_bo->vbo.base);
- ret = ttm_prime_object_init(tfile,
- size,
- &user_bo->prime,
- shareable,
- ttm_buffer_type,
- &vmw_user_bo_release,
- &vmw_user_bo_ref_obj_release);
- if (unlikely(ret != 0)) {
- ttm_bo_unref(&tmp);
- goto out_no_base_object;
- }
- *p_vbo = &user_bo->vbo;
- 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_bo_verify_access - verify access permissions on this
- * buffer object.
- *
- * @bo: Pointer to the buffer object being accessed
- * @tfile: Identifying the caller.
- */
- int vmw_user_bo_verify_access(struct ttm_buffer_object *bo,
- struct ttm_object_file *tfile)
- {
- struct vmw_user_buffer_object *vmw_user_bo;
- if (unlikely(bo->destroy != vmw_user_bo_destroy))
- return -EPERM;
- vmw_user_bo = vmw_user_buffer_object(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_bo_synccpu_grab - Grab a struct vmw_user_buffer_object 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.
- * Return: Zero on success, Negative error code on error. In particular,
- * -EBUSY will be returned if a dontblock operation is requested and the
- * buffer object is busy, and -ERESTARTSYS will be returned if a wait is
- * interrupted by a signal.
- *
- * A blocking grab will be automatically released when @tfile is closed.
- */
- static int vmw_user_bo_synccpu_grab(struct vmw_user_buffer_object *user_bo,
- struct ttm_object_file *tfile,
- uint32_t flags)
- {
- struct ttm_buffer_object *bo = &user_bo->vbo.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, false);
- if (ret != 0 || existed)
- ttm_bo_synccpu_write_release(&user_bo->vbo.base);
- return ret;
- }
- /**
- * vmw_user_bo_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_bo_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_bo_synccpu_ioctl - ioctl function implementing the synccpu
- * functionality.
- *
- * @dev: Identifies the drm device.
- * @data: Pointer to the ioctl argument.
- * @file_priv: Identifies the caller.
- * Return: Zero on success, negative error code on error.
- *
- * This function checks the ioctl arguments for validity and calls the
- * relevant synccpu functions.
- */
- int vmw_user_bo_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_buffer_object *vbo;
- struct vmw_user_buffer_object *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_bo_lookup(tfile, arg->handle, &vbo,
- &buffer_base);
- if (unlikely(ret != 0))
- return ret;
- user_bo = container_of(vbo, struct vmw_user_buffer_object,
- vbo);
- ret = vmw_user_bo_synccpu_grab(user_bo, tfile, arg->flags);
- vmw_bo_unreference(&vbo);
- 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_bo_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;
- }
- /**
- * vmw_bo_alloc_ioctl - ioctl function implementing the buffer object
- * allocation functionality.
- *
- * @dev: Identifies the drm device.
- * @data: Pointer to the ioctl argument.
- * @file_priv: Identifies the caller.
- * Return: Zero on success, negative error code on error.
- *
- * This function checks the ioctl arguments for validity and allocates a
- * struct vmw_user_buffer_object bo.
- */
- int vmw_bo_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_buffer_object *vbo;
- uint32_t handle;
- int ret;
- ret = ttm_read_lock(&dev_priv->reservation_sem, true);
- if (unlikely(ret != 0))
- return ret;
- ret = vmw_user_bo_alloc(dev_priv, vmw_fpriv(file_priv)->tfile,
- req->size, false, &handle, &vbo,
- NULL);
- if (unlikely(ret != 0))
- goto out_no_bo;
- rep->handle = handle;
- rep->map_handle = drm_vma_node_offset_addr(&vbo->base.vma_node);
- rep->cur_gmr_id = handle;
- rep->cur_gmr_offset = 0;
- vmw_bo_unreference(&vbo);
- out_no_bo:
- ttm_read_unlock(&dev_priv->reservation_sem);
- return ret;
- }
- /**
- * vmw_bo_unref_ioctl - Generic handle close ioctl.
- *
- * @dev: Identifies the drm device.
- * @data: Pointer to the ioctl argument.
- * @file_priv: Identifies the caller.
- * Return: Zero on success, negative error code on error.
- *
- * This function checks the ioctl arguments for validity and closes a
- * handle to a TTM base object, optionally freeing the object.
- */
- int vmw_bo_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);
- }
- /**
- * vmw_user_bo_lookup - Look up a vmw user buffer object from a handle.
- *
- * @tfile: The TTM object file the handle is registered with.
- * @handle: The user buffer object handle
- * @out: Pointer to a where a pointer to the embedded
- * struct vmw_buffer_object should be placed.
- * @p_base: Pointer to where a pointer to the TTM base object should be
- * placed, or NULL if no such pointer is required.
- * Return: Zero on success, Negative error code on error.
- *
- * Both the output base object pointer and the vmw buffer object pointer
- * will be refcounted.
- */
- int vmw_user_bo_lookup(struct ttm_object_file *tfile,
- uint32_t handle, struct vmw_buffer_object **out,
- struct ttm_base_object **p_base)
- {
- struct vmw_user_buffer_object *vmw_user_bo;
- struct ttm_base_object *base;
- base = ttm_base_object_lookup(tfile, handle);
- if (unlikely(base == NULL)) {
- DRM_ERROR("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);
- DRM_ERROR("Invalid buffer object handle 0x%08lx.\n",
- (unsigned long)handle);
- return -EINVAL;
- }
- vmw_user_bo = container_of(base, struct vmw_user_buffer_object,
- prime.base);
- (void)ttm_bo_reference(&vmw_user_bo->vbo.base);
- if (p_base)
- *p_base = base;
- else
- ttm_base_object_unref(&base);
- *out = &vmw_user_bo->vbo;
- return 0;
- }
- /**
- * vmw_user_bo_reference - Open a handle to a vmw user buffer object.
- *
- * @tfile: The TTM object file to register the handle with.
- * @vbo: The embedded vmw buffer object.
- * @handle: Pointer to where the new handle should be placed.
- * Return: Zero on success, Negative error code on error.
- */
- int vmw_user_bo_reference(struct ttm_object_file *tfile,
- struct vmw_buffer_object *vbo,
- uint32_t *handle)
- {
- struct vmw_user_buffer_object *user_bo;
- if (vbo->base.destroy != vmw_user_bo_destroy)
- return -EINVAL;
- user_bo = container_of(vbo, struct vmw_user_buffer_object, vbo);
- *handle = user_bo->prime.base.hash.key;
- return ttm_ref_object_add(tfile, &user_bo->prime.base,
- TTM_REF_USAGE, NULL, false);
- }
- /**
- * vmw_bo_fence_single - 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_bo_fence_single(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);
- dma_fence_put(&fence->base);
- } else
- reservation_object_add_excl_fence(bo->resv, &fence->base);
- }
- /**
- * 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
- * Return: Zero on success, negative error code on failure.
- *
- * This is a driver callback for the core drm create_dumb functionality.
- * Note that this is very similar to the vmw_bo_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_buffer_object *vbo;
- 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_bo_alloc(dev_priv, vmw_fpriv(file_priv)->tfile,
- args->size, false, &args->handle,
- &vbo, NULL);
- if (unlikely(ret != 0))
- goto out_no_bo;
- vmw_bo_unreference(&vbo);
- out_no_bo:
- 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.
- * Return: Zero on success, negative error code on failure.
- *
- * 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_buffer_object *out_buf;
- int ret;
- ret = vmw_user_bo_lookup(tfile, handle, &out_buf, NULL);
- if (ret != 0)
- return -EINVAL;
- *offset = drm_vma_node_offset_addr(&out_buf->base.vma_node);
- vmw_bo_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.
- * Return: Zero on success, negative error code on failure.
- *
- * 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_bo_swap_notify - swapout notify callback.
- *
- * @bo: The buffer object to be swapped out.
- */
- void vmw_bo_swap_notify(struct ttm_buffer_object *bo)
- {
- /* Is @bo embedded in a struct vmw_buffer_object? */
- if (bo->destroy != vmw_bo_bo_free &&
- bo->destroy != vmw_user_bo_destroy)
- return;
- /* Kill any cached kernel maps before swapout */
- vmw_bo_unmap(vmw_buffer_object(bo));
- }
- /**
- * vmw_bo_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.
- *
- * Detaches cached maps and device bindings that require that the
- * buffer doesn't move.
- */
- void vmw_bo_move_notify(struct ttm_buffer_object *bo,
- struct ttm_mem_reg *mem)
- {
- struct vmw_buffer_object *vbo;
- if (mem == NULL)
- return;
- /* Make sure @bo is embedded in a struct vmw_buffer_object? */
- if (bo->destroy != vmw_bo_bo_free &&
- bo->destroy != vmw_user_bo_destroy)
- return;
- vbo = container_of(bo, struct vmw_buffer_object, base);
- /*
- * Kill any cached kernel maps before move to or from VRAM.
- * With other types of moves, the underlying pages stay the same,
- * and the map can be kept.
- */
- if (mem->mem_type == TTM_PL_VRAM || bo->mem.mem_type == TTM_PL_VRAM)
- vmw_bo_unmap(vbo);
- /*
- * If we're moving a backup MOB out of MOB placement, then make sure we
- * read back all resource content first, and unbind the MOB from
- * the resource.
- */
- if (mem->mem_type != VMW_PL_MOB && bo->mem.mem_type == VMW_PL_MOB)
- vmw_resource_unbind_list(vbo);
- }
|