vmwgfx_buffer.c 22.0 KB
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/**************************************************************************
 *
 * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 **************************************************************************/

#include "vmwgfx_drv.h"
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#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_page_alloc.h>
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static uint32_t vram_placement_flags = TTM_PL_FLAG_VRAM |
	TTM_PL_FLAG_CACHED;

static uint32_t vram_ne_placement_flags = TTM_PL_FLAG_VRAM |
	TTM_PL_FLAG_CACHED |
	TTM_PL_FLAG_NO_EVICT;

static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM |
	TTM_PL_FLAG_CACHED;

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static uint32_t sys_ne_placement_flags = TTM_PL_FLAG_SYSTEM |
	TTM_PL_FLAG_CACHED |
	TTM_PL_FLAG_NO_EVICT;

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static uint32_t gmr_placement_flags = VMW_PL_FLAG_GMR |
	TTM_PL_FLAG_CACHED;

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static uint32_t gmr_ne_placement_flags = VMW_PL_FLAG_GMR |
	TTM_PL_FLAG_CACHED |
	TTM_PL_FLAG_NO_EVICT;

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static uint32_t mob_placement_flags = VMW_PL_FLAG_MOB |
	TTM_PL_FLAG_CACHED;

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struct ttm_placement vmw_vram_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.placement = &vram_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &vram_placement_flags
};

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static uint32_t vram_gmr_placement_flags[] = {
	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
};

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static uint32_t gmr_vram_placement_flags[] = {
	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED,
	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
};

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struct ttm_placement vmw_vram_gmr_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 2,
	.placement = vram_gmr_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &gmr_placement_flags
};

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static uint32_t vram_gmr_ne_placement_flags[] = {
	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT,
	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
};

struct ttm_placement vmw_vram_gmr_ne_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 2,
	.placement = vram_gmr_ne_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &gmr_ne_placement_flags
};

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struct ttm_placement vmw_vram_sys_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.placement = &vram_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &sys_placement_flags
};

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struct ttm_placement vmw_vram_ne_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.placement = &vram_ne_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &vram_ne_placement_flags
};

struct ttm_placement vmw_sys_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.placement = &sys_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &sys_placement_flags
};

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struct ttm_placement vmw_sys_ne_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.placement = &sys_ne_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &sys_ne_placement_flags
};

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static uint32_t evictable_placement_flags[] = {
	TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED,
	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
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	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED,
	VMW_PL_FLAG_MOB | TTM_PL_FLAG_CACHED
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};

struct ttm_placement vmw_evictable_placement = {
	.fpfn = 0,
	.lpfn = 0,
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	.num_placement = 4,
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	.placement = evictable_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &sys_placement_flags
};

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struct ttm_placement vmw_srf_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.num_busy_placement = 2,
	.placement = &gmr_placement_flags,
	.busy_placement = gmr_vram_placement_flags
};

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struct ttm_placement vmw_mob_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.num_busy_placement = 1,
	.placement = &mob_placement_flags,
	.busy_placement = &mob_placement_flags
};

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struct vmw_ttm_tt {
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	struct ttm_dma_tt dma_ttm;
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	struct vmw_private *dev_priv;
	int gmr_id;
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	struct vmw_mob *mob;
	int mem_type;
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	struct sg_table sgt;
	struct vmw_sg_table vsgt;
	uint64_t sg_alloc_size;
	bool mapped;
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};

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const size_t vmw_tt_size = sizeof(struct vmw_ttm_tt);

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/**
 * Helper functions to advance a struct vmw_piter iterator.
 *
 * @viter: Pointer to the iterator.
 *
 * These functions return false if past the end of the list,
 * true otherwise. Functions are selected depending on the current
 * DMA mapping mode.
 */
static bool __vmw_piter_non_sg_next(struct vmw_piter *viter)
{
	return ++(viter->i) < viter->num_pages;
}

static bool __vmw_piter_sg_next(struct vmw_piter *viter)
{
	return __sg_page_iter_next(&viter->iter);
}


/**
 * Helper functions to return a pointer to the current page.
 *
 * @viter: Pointer to the iterator
 *
 * These functions return a pointer to the page currently
 * pointed to by @viter. Functions are selected depending on the
 * current mapping mode.
 */
static struct page *__vmw_piter_non_sg_page(struct vmw_piter *viter)
{
	return viter->pages[viter->i];
}

static struct page *__vmw_piter_sg_page(struct vmw_piter *viter)
{
	return sg_page_iter_page(&viter->iter);
}


/**
 * Helper functions to return the DMA address of the current page.
 *
 * @viter: Pointer to the iterator
 *
 * These functions return the DMA address of the page currently
 * pointed to by @viter. Functions are selected depending on the
 * current mapping mode.
 */
static dma_addr_t __vmw_piter_phys_addr(struct vmw_piter *viter)
{
	return page_to_phys(viter->pages[viter->i]);
}

static dma_addr_t __vmw_piter_dma_addr(struct vmw_piter *viter)
{
	return viter->addrs[viter->i];
}

static dma_addr_t __vmw_piter_sg_addr(struct vmw_piter *viter)
{
	return sg_page_iter_dma_address(&viter->iter);
}


/**
 * vmw_piter_start - Initialize a struct vmw_piter.
 *
 * @viter: Pointer to the iterator to initialize
 * @vsgt: Pointer to a struct vmw_sg_table to initialize from
 *
 * Note that we're following the convention of __sg_page_iter_start, so that
 * the iterator doesn't point to a valid page after initialization; it has
 * to be advanced one step first.
 */
void vmw_piter_start(struct vmw_piter *viter, const struct vmw_sg_table *vsgt,
		     unsigned long p_offset)
{
	viter->i = p_offset - 1;
	viter->num_pages = vsgt->num_pages;
	switch (vsgt->mode) {
	case vmw_dma_phys:
		viter->next = &__vmw_piter_non_sg_next;
		viter->dma_address = &__vmw_piter_phys_addr;
		viter->page = &__vmw_piter_non_sg_page;
		viter->pages = vsgt->pages;
		break;
	case vmw_dma_alloc_coherent:
		viter->next = &__vmw_piter_non_sg_next;
		viter->dma_address = &__vmw_piter_dma_addr;
		viter->page = &__vmw_piter_non_sg_page;
		viter->addrs = vsgt->addrs;
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		viter->pages = vsgt->pages;
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		break;
	case vmw_dma_map_populate:
	case vmw_dma_map_bind:
		viter->next = &__vmw_piter_sg_next;
		viter->dma_address = &__vmw_piter_sg_addr;
		viter->page = &__vmw_piter_sg_page;
		__sg_page_iter_start(&viter->iter, vsgt->sgt->sgl,
				     vsgt->sgt->orig_nents, p_offset);
		break;
	default:
		BUG();
	}
}

/**
 * vmw_ttm_unmap_from_dma - unmap  device addresses previsouly mapped for
 * TTM pages
 *
 * @vmw_tt: Pointer to a struct vmw_ttm_backend
 *
 * Used to free dma mappings previously mapped by vmw_ttm_map_for_dma.
 */
static void vmw_ttm_unmap_from_dma(struct vmw_ttm_tt *vmw_tt)
{
	struct device *dev = vmw_tt->dev_priv->dev->dev;

	dma_unmap_sg(dev, vmw_tt->sgt.sgl, vmw_tt->sgt.nents,
		DMA_BIDIRECTIONAL);
	vmw_tt->sgt.nents = vmw_tt->sgt.orig_nents;
}

/**
 * vmw_ttm_map_for_dma - map TTM pages to get device addresses
 *
 * @vmw_tt: Pointer to a struct vmw_ttm_backend
 *
 * This function is used to get device addresses from the kernel DMA layer.
 * However, it's violating the DMA API in that when this operation has been
 * performed, it's illegal for the CPU to write to the pages without first
 * unmapping the DMA mappings, or calling dma_sync_sg_for_cpu(). It is
 * therefore only legal to call this function if we know that the function
 * dma_sync_sg_for_cpu() is a NOP, and dma_sync_sg_for_device() is at most
 * a CPU write buffer flush.
 */
static int vmw_ttm_map_for_dma(struct vmw_ttm_tt *vmw_tt)
{
	struct device *dev = vmw_tt->dev_priv->dev->dev;
	int ret;

	ret = dma_map_sg(dev, vmw_tt->sgt.sgl, vmw_tt->sgt.orig_nents,
			 DMA_BIDIRECTIONAL);
	if (unlikely(ret == 0))
		return -ENOMEM;

	vmw_tt->sgt.nents = ret;

	return 0;
}

/**
 * vmw_ttm_map_dma - Make sure TTM pages are visible to the device
 *
 * @vmw_tt: Pointer to a struct vmw_ttm_tt
 *
 * Select the correct function for and make sure the TTM pages are
 * visible to the device. Allocate storage for the device mappings.
 * If a mapping has already been performed, indicated by the storage
 * pointer being non NULL, the function returns success.
 */
static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
{
	struct vmw_private *dev_priv = vmw_tt->dev_priv;
	struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
	struct vmw_sg_table *vsgt = &vmw_tt->vsgt;
	struct vmw_piter iter;
	dma_addr_t old;
	int ret = 0;
	static size_t sgl_size;
	static size_t sgt_size;

	if (vmw_tt->mapped)
		return 0;

	vsgt->mode = dev_priv->map_mode;
	vsgt->pages = vmw_tt->dma_ttm.ttm.pages;
	vsgt->num_pages = vmw_tt->dma_ttm.ttm.num_pages;
	vsgt->addrs = vmw_tt->dma_ttm.dma_address;
	vsgt->sgt = &vmw_tt->sgt;

	switch (dev_priv->map_mode) {
	case vmw_dma_map_bind:
	case vmw_dma_map_populate:
		if (unlikely(!sgl_size)) {
			sgl_size = ttm_round_pot(sizeof(struct scatterlist));
			sgt_size = ttm_round_pot(sizeof(struct sg_table));
		}
		vmw_tt->sg_alloc_size = sgt_size + sgl_size * vsgt->num_pages;
		ret = ttm_mem_global_alloc(glob, vmw_tt->sg_alloc_size, false,
					   true);
		if (unlikely(ret != 0))
			return ret;

		ret = sg_alloc_table_from_pages(&vmw_tt->sgt, vsgt->pages,
						vsgt->num_pages, 0,
						(unsigned long)
						vsgt->num_pages << PAGE_SHIFT,
						GFP_KERNEL);
		if (unlikely(ret != 0))
			goto out_sg_alloc_fail;

		if (vsgt->num_pages > vmw_tt->sgt.nents) {
			uint64_t over_alloc =
				sgl_size * (vsgt->num_pages -
					    vmw_tt->sgt.nents);

			ttm_mem_global_free(glob, over_alloc);
			vmw_tt->sg_alloc_size -= over_alloc;
		}

		ret = vmw_ttm_map_for_dma(vmw_tt);
		if (unlikely(ret != 0))
			goto out_map_fail;

		break;
	default:
		break;
	}

	old = ~((dma_addr_t) 0);
	vmw_tt->vsgt.num_regions = 0;
	for (vmw_piter_start(&iter, vsgt, 0); vmw_piter_next(&iter);) {
		dma_addr_t cur = vmw_piter_dma_addr(&iter);

		if (cur != old + PAGE_SIZE)
			vmw_tt->vsgt.num_regions++;
		old = cur;
	}

	vmw_tt->mapped = true;
	return 0;

out_map_fail:
	sg_free_table(vmw_tt->vsgt.sgt);
	vmw_tt->vsgt.sgt = NULL;
out_sg_alloc_fail:
	ttm_mem_global_free(glob, vmw_tt->sg_alloc_size);
	return ret;
}

/**
 * vmw_ttm_unmap_dma - Tear down any TTM page device mappings
 *
 * @vmw_tt: Pointer to a struct vmw_ttm_tt
 *
 * Tear down any previously set up device DMA mappings and free
 * any storage space allocated for them. If there are no mappings set up,
 * this function is a NOP.
 */
static void vmw_ttm_unmap_dma(struct vmw_ttm_tt *vmw_tt)
{
	struct vmw_private *dev_priv = vmw_tt->dev_priv;

	if (!vmw_tt->vsgt.sgt)
		return;

	switch (dev_priv->map_mode) {
	case vmw_dma_map_bind:
	case vmw_dma_map_populate:
		vmw_ttm_unmap_from_dma(vmw_tt);
		sg_free_table(vmw_tt->vsgt.sgt);
		vmw_tt->vsgt.sgt = NULL;
		ttm_mem_global_free(vmw_mem_glob(dev_priv),
				    vmw_tt->sg_alloc_size);
		break;
	default:
		break;
	}
	vmw_tt->mapped = false;
}

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/**
 * vmw_bo_map_dma - Make sure buffer object pages are visible to the device
 *
 * @bo: Pointer to a struct ttm_buffer_object
 *
 * Wrapper around vmw_ttm_map_dma, that takes a TTM buffer object pointer
 * instead of a pointer to a struct vmw_ttm_backend as argument.
 * Note that the buffer object must be either pinned or reserved before
 * calling this function.
 */
int vmw_bo_map_dma(struct ttm_buffer_object *bo)
{
	struct vmw_ttm_tt *vmw_tt =
		container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);

	return vmw_ttm_map_dma(vmw_tt);
}


/**
 * vmw_bo_unmap_dma - Make sure buffer object pages are visible to the device
 *
 * @bo: Pointer to a struct ttm_buffer_object
 *
 * Wrapper around vmw_ttm_unmap_dma, that takes a TTM buffer object pointer
 * instead of a pointer to a struct vmw_ttm_backend as argument.
 */
void vmw_bo_unmap_dma(struct ttm_buffer_object *bo)
{
	struct vmw_ttm_tt *vmw_tt =
		container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);

	vmw_ttm_unmap_dma(vmw_tt);
}


/**
 * vmw_bo_sg_table - Return a struct vmw_sg_table object for a
 * TTM buffer object
 *
 * @bo: Pointer to a struct ttm_buffer_object
 *
 * Returns a pointer to a struct vmw_sg_table object. The object should
 * not be freed after use.
 * Note that for the device addresses to be valid, the buffer object must
 * either be reserved or pinned.
 */
const struct vmw_sg_table *vmw_bo_sg_table(struct ttm_buffer_object *bo)
{
	struct vmw_ttm_tt *vmw_tt =
		container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);

	return &vmw_tt->vsgt;
}


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static int vmw_ttm_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
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{
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	struct vmw_ttm_tt *vmw_be =
		container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
	int ret;

	ret = vmw_ttm_map_dma(vmw_be);
	if (unlikely(ret != 0))
		return ret;
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	vmw_be->gmr_id = bo_mem->start;
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	vmw_be->mem_type = bo_mem->mem_type;
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	switch (bo_mem->mem_type) {
	case VMW_PL_GMR:
		return vmw_gmr_bind(vmw_be->dev_priv, &vmw_be->vsgt,
				    ttm->num_pages, vmw_be->gmr_id);
	case VMW_PL_MOB:
		if (unlikely(vmw_be->mob == NULL)) {
			vmw_be->mob =
				vmw_mob_create(ttm->num_pages);
			if (unlikely(vmw_be->mob == NULL))
				return -ENOMEM;
		}

		return vmw_mob_bind(vmw_be->dev_priv, vmw_be->mob,
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				    &vmw_be->vsgt, ttm->num_pages,
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				    vmw_be->gmr_id);
	default:
		BUG();
	}
	return 0;
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}

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static int vmw_ttm_unbind(struct ttm_tt *ttm)
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{
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	struct vmw_ttm_tt *vmw_be =
		container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
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	switch (vmw_be->mem_type) {
	case VMW_PL_GMR:
		vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
		break;
	case VMW_PL_MOB:
		vmw_mob_unbind(vmw_be->dev_priv, vmw_be->mob);
		break;
	default:
		BUG();
	}
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	if (vmw_be->dev_priv->map_mode == vmw_dma_map_bind)
		vmw_ttm_unmap_dma(vmw_be);

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	return 0;
}

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static void vmw_ttm_destroy(struct ttm_tt *ttm)
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{
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	struct vmw_ttm_tt *vmw_be =
		container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);

	vmw_ttm_unmap_dma(vmw_be);
	if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
		ttm_dma_tt_fini(&vmw_be->dma_ttm);
	else
		ttm_tt_fini(ttm);
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	if (vmw_be->mob)
		vmw_mob_destroy(vmw_be->mob);

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	kfree(vmw_be);
}

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static int vmw_ttm_populate(struct ttm_tt *ttm)
{
	struct vmw_ttm_tt *vmw_tt =
		container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
	struct vmw_private *dev_priv = vmw_tt->dev_priv;
	struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
	int ret;

	if (ttm->state != tt_unpopulated)
		return 0;

	if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
		size_t size =
			ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
		ret = ttm_mem_global_alloc(glob, size, false, true);
		if (unlikely(ret != 0))
			return ret;

		ret = ttm_dma_populate(&vmw_tt->dma_ttm, dev_priv->dev->dev);
		if (unlikely(ret != 0))
			ttm_mem_global_free(glob, size);
	} else
		ret = ttm_pool_populate(ttm);

	return ret;
}

static void vmw_ttm_unpopulate(struct ttm_tt *ttm)
{
	struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
						 dma_ttm.ttm);
	struct vmw_private *dev_priv = vmw_tt->dev_priv;
	struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);

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	if (vmw_tt->mob) {
		vmw_mob_destroy(vmw_tt->mob);
		vmw_tt->mob = NULL;
	}

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	vmw_ttm_unmap_dma(vmw_tt);
	if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
		size_t size =
			ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));

		ttm_dma_unpopulate(&vmw_tt->dma_ttm, dev_priv->dev->dev);
		ttm_mem_global_free(glob, size);
	} else
		ttm_pool_unpopulate(ttm);
}

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static struct ttm_backend_func vmw_ttm_func = {
	.bind = vmw_ttm_bind,
	.unbind = vmw_ttm_unbind,
	.destroy = vmw_ttm_destroy,
};

645
static struct ttm_tt *vmw_ttm_tt_create(struct ttm_bo_device *bdev,
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				 unsigned long size, uint32_t page_flags,
				 struct page *dummy_read_page)
648
{
649
	struct vmw_ttm_tt *vmw_be;
650
	int ret;
651

652
	vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
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	if (!vmw_be)
		return NULL;

656
	vmw_be->dma_ttm.ttm.func = &vmw_ttm_func;
657
	vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);
658
	vmw_be->mob = NULL;
659

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	if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
		ret = ttm_dma_tt_init(&vmw_be->dma_ttm, bdev, size, page_flags,
				      dummy_read_page);
	else
		ret = ttm_tt_init(&vmw_be->dma_ttm.ttm, bdev, size, page_flags,
				  dummy_read_page);
	if (unlikely(ret != 0))
		goto out_no_init;

	return &vmw_be->dma_ttm.ttm;
out_no_init:
	kfree(vmw_be);
	return NULL;
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}

675
static int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
676 677 678 679
{
	return 0;
}

680
static int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
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		      struct ttm_mem_type_manager *man)
{
	switch (type) {
	case TTM_PL_SYSTEM:
		/* System memory */

		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
688
		man->available_caching = TTM_PL_FLAG_CACHED;
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		man->default_caching = TTM_PL_FLAG_CACHED;
		break;
	case TTM_PL_VRAM:
		/* "On-card" video ram */
693
		man->func = &ttm_bo_manager_func;
694
		man->gpu_offset = 0;
695
		man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
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		man->available_caching = TTM_PL_FLAG_CACHED;
		man->default_caching = TTM_PL_FLAG_CACHED;
		break;
	case VMW_PL_GMR:
700
	case VMW_PL_MOB:
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		/*
		 * "Guest Memory Regions" is an aperture like feature with
		 *  one slot per bo. There is an upper limit of the number of
		 *  slots as well as the bo size.
		 */
		man->func = &vmw_gmrid_manager_func;
		man->gpu_offset = 0;
		man->flags = TTM_MEMTYPE_FLAG_CMA | TTM_MEMTYPE_FLAG_MAPPABLE;
		man->available_caching = TTM_PL_FLAG_CACHED;
		man->default_caching = TTM_PL_FLAG_CACHED;
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		break;
	default:
		DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
		return -EINVAL;
	}
	return 0;
}

719
static void vmw_evict_flags(struct ttm_buffer_object *bo,
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		     struct ttm_placement *placement)
{
	*placement = vmw_sys_placement;
}

static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
{
727 728 729 730
	struct ttm_object_file *tfile =
		vmw_fpriv((struct drm_file *)filp->private_data)->tfile;

	return vmw_user_dmabuf_verify_access(bo, tfile);
731 732
}

733 734 735 736 737 738 739 740 741 742 743 744 745 746
static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
{
	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
	struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);

	mem->bus.addr = NULL;
	mem->bus.is_iomem = false;
	mem->bus.offset = 0;
	mem->bus.size = mem->num_pages << PAGE_SHIFT;
	mem->bus.base = 0;
	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
		return -EINVAL;
	switch (mem->mem_type) {
	case TTM_PL_SYSTEM:
747
	case VMW_PL_GMR:
748
	case VMW_PL_MOB:
749 750
		return 0;
	case TTM_PL_VRAM:
751
		mem->bus.offset = mem->start << PAGE_SHIFT;
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		mem->bus.base = dev_priv->vram_start;
		mem->bus.is_iomem = true;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static void vmw_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
{
}

static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
{
	return 0;
}

770 771 772 773 774 775 776
/**
 * FIXME: We're using the old vmware polling method to sync.
 * Do this with fences instead.
 */

static void *vmw_sync_obj_ref(void *sync_obj)
{
777 778 779

	return (void *)
		vmw_fence_obj_reference((struct vmw_fence_obj *) sync_obj);
780 781 782 783
}

static void vmw_sync_obj_unref(void **sync_obj)
{
784
	vmw_fence_obj_unreference((struct vmw_fence_obj **) sync_obj);
785 786
}

787
static int vmw_sync_obj_flush(void *sync_obj)
788
{
789
	vmw_fence_obj_flush((struct vmw_fence_obj *) sync_obj);
790 791 792
	return 0;
}

793
static bool vmw_sync_obj_signaled(void *sync_obj)
794
{
795
	return	vmw_fence_obj_signaled((struct vmw_fence_obj *) sync_obj,
796
				       DRM_VMW_FENCE_FLAG_EXEC);
797 798 799

}

800
static int vmw_sync_obj_wait(void *sync_obj, bool lazy, bool interruptible)
801
{
802
	return vmw_fence_obj_wait((struct vmw_fence_obj *) sync_obj,
803
				  DRM_VMW_FENCE_FLAG_EXEC,
804 805
				  lazy, interruptible,
				  VMW_FENCE_WAIT_TIMEOUT);
806 807
}

808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839
/**
 * vmw_move_notify - TTM move_notify_callback
 *
 * @bo:             The TTM buffer object about to move.
 * @mem:            The truct ttm_mem_reg indicating to what memory
 *                  region the move is taking place.
 *
 * Calls move_notify for all subsystems needing it.
 * (currently only resources).
 */
static void vmw_move_notify(struct ttm_buffer_object *bo,
			    struct ttm_mem_reg *mem)
{
	vmw_resource_move_notify(bo, mem);
}


/**
 * vmw_swap_notify - TTM move_notify_callback
 *
 * @bo:             The TTM buffer object about to be swapped out.
 */
static void vmw_swap_notify(struct ttm_buffer_object *bo)
{
	struct ttm_bo_device *bdev = bo->bdev;

	spin_lock(&bdev->fence_lock);
	ttm_bo_wait(bo, false, false, false);
	spin_unlock(&bdev->fence_lock);
}


840
struct ttm_bo_driver vmw_bo_driver = {
841
	.ttm_tt_create = &vmw_ttm_tt_create,
842 843
	.ttm_tt_populate = &vmw_ttm_populate,
	.ttm_tt_unpopulate = &vmw_ttm_unpopulate,
844 845 846 847 848 849 850 851 852
	.invalidate_caches = vmw_invalidate_caches,
	.init_mem_type = vmw_init_mem_type,
	.evict_flags = vmw_evict_flags,
	.move = NULL,
	.verify_access = vmw_verify_access,
	.sync_obj_signaled = vmw_sync_obj_signaled,
	.sync_obj_wait = vmw_sync_obj_wait,
	.sync_obj_flush = vmw_sync_obj_flush,
	.sync_obj_unref = vmw_sync_obj_unref,
853
	.sync_obj_ref = vmw_sync_obj_ref,
854 855
	.move_notify = vmw_move_notify,
	.swap_notify = vmw_swap_notify,
856 857 858
	.fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
	.io_mem_reserve = &vmw_ttm_io_mem_reserve,
	.io_mem_free = &vmw_ttm_io_mem_free,
859
};