vmwgfx_bo.c | Explore in Territory

// SPDX-License-Identifier: GPL-2.0 OR MIT
/**************************************************************************
 *
 * Copyright (c) 2011-2024 Broadcom. All Rights Reserved. The term
 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
 *
 * 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
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 **************************************************************************/

#include "vmwgfx_bo.h"
#include "vmwgfx_drv.h"
#include "vmwgfx_resource_priv.h"

#include <drm/ttm/ttm_placement.h>

static void vmw_bo_release(struct vmw_bo *vbo)
{ … }

/**
 * vmw_bo_free - vmw_bo destructor
 *
 * @bo: Pointer to the embedded struct ttm_buffer_object
 */
static void vmw_bo_free(struct ttm_buffer_object *bo)
{ … }

/**
 * 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
 */
static int vmw_bo_pin_in_placement(struct vmw_private *dev_priv,
				   struct vmw_bo *buf,
				   struct ttm_placement *placement,
				   bool interruptible)
{ … }


/**
 * 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.
 * @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_bo *buf,
			      bool interruptible)
{ … }


/**
 * 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_bo *buf,
		       bool 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_bo *buf,
				bool interruptible)
{ … }


/**
 * 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_bo *buf,
		 bool interruptible)
{ … }

/**
 * 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)
{ … }


/**
 * 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_bo *vbo, bool pin)
{ … }

/**
 * 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_bo *vbo)
{ … }

void *vmw_bo_map_and_cache_size(struct vmw_bo *vbo, size_t size)
{ … }


/**
 * 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_bo_map_and_cache().
 */
void vmw_bo_unmap(struct vmw_bo *vbo)
{ … }


/**
 * vmw_bo_init - Initialize a vmw buffer object
 *
 * @dev_priv: Pointer to the device private struct
 * @vmw_bo: Buffer object to initialize
 * @params: Parameters used to initialize the buffer object
 * @destroy: The function used to delete the buffer object
 * Returns: Zero on success, negative error code on error.
 *
 */
static int vmw_bo_init(struct vmw_private *dev_priv,
		       struct vmw_bo *vmw_bo,
		       struct vmw_bo_params *params,
		       void (*destroy)(struct ttm_buffer_object *))
{ … }

int vmw_bo_create(struct vmw_private *vmw,
		  struct vmw_bo_params *params,
		  struct vmw_bo **p_bo)
{ … }

/**
 * vmw_user_bo_synccpu_grab - Grab a struct vmw_bo for cpu
 * access, idling previous GPU operations on the buffer and optionally
 * blocking it for further command submissions.
 *
 * @vmw_bo: Pointer to the buffer object being grabbed for CPU access
 * @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_bo *vmw_bo,
				    uint32_t flags)
{ … }

/**
 * vmw_user_bo_synccpu_release - Release a previous grab for CPU access,
 * and unblock command submission on the buffer if blocked.
 *
 * @filp: Identifying the caller.
 * @handle: Handle identifying the buffer object.
 * @flags: Flags indicating the type of release.
 */
static int vmw_user_bo_synccpu_release(struct drm_file *filp,
				       uint32_t handle,
				       uint32_t flags)
{ … }


/**
 * 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)
{ … }

/**
 * 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)
{ … }


/**
 * vmw_user_bo_lookup - Look up a vmw user buffer object from a handle.
 *
 * @filp: The file the handle is registered with.
 * @handle: The user buffer object handle
 * @out: Pointer to a where a pointer to the embedded
 * struct vmw_bo should be placed.
 * Return: Zero on success, Negative error code on error.
 *
 * The vmw buffer object pointer will be refcounted (both ttm and gem)
 */
int vmw_user_bo_lookup(struct drm_file *filp,
		       u32 handle,
		       struct vmw_bo **out)
{ … }

/**
 * 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)
{ … }

/**
 * 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)
{ … }


/**
 * vmw_bo_move_notify - TTM move_notify_callback
 *
 * @bo: The TTM buffer object about to move.
 * @mem: The struct ttm_resource 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_resource *mem)
{ … }

static u32 placement_flags(u32 domain, u32 desired, u32 fallback)
{ … }

static u32
set_placement_list(struct ttm_place *pl, u32 desired, u32 fallback)
{ … }

void vmw_bo_placement_set(struct vmw_bo *bo, u32 domain, u32 busy_domain)
{ … }

void vmw_bo_placement_set_default_accelerated(struct vmw_bo *bo)
{ … }

void vmw_bo_add_detached_resource(struct vmw_bo *vbo, struct vmw_resource *res)
{ … }

void vmw_bo_del_detached_resource(struct vmw_bo *vbo, struct vmw_resource *res)
{ … }

struct vmw_surface *vmw_bo_surface(struct vmw_bo *vbo)
{ … }
linux/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
