diff options
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 842 |
1 files changed, 842 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c new file mode 100644 index 000000000..73116ec70 --- /dev/null +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c @@ -0,0 +1,842 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/************************************************************************** + * + * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA + * + * 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/ttm/ttm_bo_driver.h> +#include <drm/ttm/ttm_placement.h> +#include <drm/ttm/ttm_page_alloc.h> + +static const struct ttm_place vram_placement_flags = { + .fpfn = 0, + .lpfn = 0, + .mem_type = TTM_PL_VRAM, + .flags = TTM_PL_FLAG_CACHED +}; + +static const struct ttm_place vram_ne_placement_flags = { + .fpfn = 0, + .lpfn = 0, + .mem_type = TTM_PL_VRAM, + .flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT +}; + +static const struct ttm_place sys_placement_flags = { + .fpfn = 0, + .lpfn = 0, + .mem_type = TTM_PL_SYSTEM, + .flags = TTM_PL_FLAG_CACHED +}; + +static const struct ttm_place sys_ne_placement_flags = { + .fpfn = 0, + .lpfn = 0, + .mem_type = TTM_PL_SYSTEM, + .flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT +}; + +static const struct ttm_place gmr_placement_flags = { + .fpfn = 0, + .lpfn = 0, + .mem_type = VMW_PL_GMR, + .flags = TTM_PL_FLAG_CACHED +}; + +static const struct ttm_place gmr_ne_placement_flags = { + .fpfn = 0, + .lpfn = 0, + .mem_type = VMW_PL_GMR, + .flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT +}; + +static const struct ttm_place mob_placement_flags = { + .fpfn = 0, + .lpfn = 0, + .mem_type = VMW_PL_MOB, + .flags = TTM_PL_FLAG_CACHED +}; + +static const struct ttm_place mob_ne_placement_flags = { + .fpfn = 0, + .lpfn = 0, + .mem_type = VMW_PL_MOB, + .flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT +}; + +struct ttm_placement vmw_vram_placement = { + .num_placement = 1, + .placement = &vram_placement_flags, + .num_busy_placement = 1, + .busy_placement = &vram_placement_flags +}; + +static const struct ttm_place vram_gmr_placement_flags[] = { + { + .fpfn = 0, + .lpfn = 0, + .mem_type = TTM_PL_VRAM, + .flags = TTM_PL_FLAG_CACHED + }, { + .fpfn = 0, + .lpfn = 0, + .mem_type = VMW_PL_GMR, + .flags = TTM_PL_FLAG_CACHED + } +}; + +static const struct ttm_place gmr_vram_placement_flags[] = { + { + .fpfn = 0, + .lpfn = 0, + .mem_type = VMW_PL_GMR, + .flags = TTM_PL_FLAG_CACHED + }, { + .fpfn = 0, + .lpfn = 0, + .mem_type = TTM_PL_VRAM, + .flags = TTM_PL_FLAG_CACHED + } +}; + +struct ttm_placement vmw_vram_gmr_placement = { + .num_placement = 2, + .placement = vram_gmr_placement_flags, + .num_busy_placement = 1, + .busy_placement = &gmr_placement_flags +}; + +static const struct ttm_place vram_gmr_ne_placement_flags[] = { + { + .fpfn = 0, + .lpfn = 0, + .mem_type = TTM_PL_VRAM, + .flags = TTM_PL_FLAG_CACHED | + TTM_PL_FLAG_NO_EVICT + }, { + .fpfn = 0, + .lpfn = 0, + .mem_type = VMW_PL_GMR, + .flags = TTM_PL_FLAG_CACHED | + TTM_PL_FLAG_NO_EVICT + } +}; + +struct ttm_placement vmw_vram_gmr_ne_placement = { + .num_placement = 2, + .placement = vram_gmr_ne_placement_flags, + .num_busy_placement = 1, + .busy_placement = &gmr_ne_placement_flags +}; + +struct ttm_placement vmw_vram_sys_placement = { + .num_placement = 1, + .placement = &vram_placement_flags, + .num_busy_placement = 1, + .busy_placement = &sys_placement_flags +}; + +struct ttm_placement vmw_vram_ne_placement = { + .num_placement = 1, + .placement = &vram_ne_placement_flags, + .num_busy_placement = 1, + .busy_placement = &vram_ne_placement_flags +}; + +struct ttm_placement vmw_sys_placement = { + .num_placement = 1, + .placement = &sys_placement_flags, + .num_busy_placement = 1, + .busy_placement = &sys_placement_flags +}; + +struct ttm_placement vmw_sys_ne_placement = { + .num_placement = 1, + .placement = &sys_ne_placement_flags, + .num_busy_placement = 1, + .busy_placement = &sys_ne_placement_flags +}; + +static const struct ttm_place evictable_placement_flags[] = { + { + .fpfn = 0, + .lpfn = 0, + .mem_type = TTM_PL_SYSTEM, + .flags = TTM_PL_FLAG_CACHED + }, { + .fpfn = 0, + .lpfn = 0, + .mem_type = TTM_PL_VRAM, + .flags = TTM_PL_FLAG_CACHED + }, { + .fpfn = 0, + .lpfn = 0, + .mem_type = VMW_PL_GMR, + .flags = TTM_PL_FLAG_CACHED + }, { + .fpfn = 0, + .lpfn = 0, + .mem_type = VMW_PL_MOB, + .flags = TTM_PL_FLAG_CACHED + } +}; + +static const struct ttm_place nonfixed_placement_flags[] = { + { + .fpfn = 0, + .lpfn = 0, + .mem_type = TTM_PL_SYSTEM, + .flags = TTM_PL_FLAG_CACHED + }, { + .fpfn = 0, + .lpfn = 0, + .mem_type = VMW_PL_GMR, + .flags = TTM_PL_FLAG_CACHED + }, { + .fpfn = 0, + .lpfn = 0, + .mem_type = VMW_PL_MOB, + .flags = TTM_PL_FLAG_CACHED + } +}; + +struct ttm_placement vmw_evictable_placement = { + .num_placement = 4, + .placement = evictable_placement_flags, + .num_busy_placement = 1, + .busy_placement = &sys_placement_flags +}; + +struct ttm_placement vmw_srf_placement = { + .num_placement = 1, + .num_busy_placement = 2, + .placement = &gmr_placement_flags, + .busy_placement = gmr_vram_placement_flags +}; + +struct ttm_placement vmw_mob_placement = { + .num_placement = 1, + .num_busy_placement = 1, + .placement = &mob_placement_flags, + .busy_placement = &mob_placement_flags +}; + +struct ttm_placement vmw_mob_ne_placement = { + .num_placement = 1, + .num_busy_placement = 1, + .placement = &mob_ne_placement_flags, + .busy_placement = &mob_ne_placement_flags +}; + +struct ttm_placement vmw_nonfixed_placement = { + .num_placement = 3, + .placement = nonfixed_placement_flags, + .num_busy_placement = 1, + .busy_placement = &sys_placement_flags +}; + +struct vmw_ttm_tt { + struct ttm_dma_tt dma_ttm; + struct vmw_private *dev_priv; + int gmr_id; + struct vmw_mob *mob; + int mem_type; + struct sg_table sgt; + struct vmw_sg_table vsgt; + uint64_t sg_alloc_size; + bool mapped; + bool bound; +}; + +const size_t vmw_tt_size = sizeof(struct vmw_ttm_tt); + +/** + * 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) +{ + bool ret = __vmw_piter_non_sg_next(viter); + + return __sg_page_iter_dma_next(&viter->iter) && ret; +} + + +/** + * 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]; +} + +/** + * 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; + viter->page = &__vmw_piter_non_sg_page; + viter->pages = vsgt->pages; + switch (vsgt->mode) { + case vmw_dma_phys: + viter->next = &__vmw_piter_non_sg_next; + viter->dma_address = &__vmw_piter_phys_addr; + break; + case vmw_dma_alloc_coherent: + viter->next = &__vmw_piter_non_sg_next; + viter->dma_address = &__vmw_piter_dma_addr; + viter->addrs = vsgt->addrs; + break; + case vmw_dma_map_populate: + case vmw_dma_map_bind: + viter->next = &__vmw_piter_sg_next; + viter->dma_address = &__vmw_piter_sg_addr; + __sg_page_iter_start(&viter->iter.base, 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_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0); + 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; + + return dma_map_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 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 ttm_operation_ctx ctx = { + .interruptible = true, + .no_wait_gpu = false + }; + struct vmw_piter iter; + dma_addr_t old; + int ret = 0; + static size_t sgl_size; + static size_t sgt_size; + struct scatterlist *sg; + + 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, &ctx); + if (unlikely(ret != 0)) + return ret; + + sg = __sg_alloc_table_from_pages(&vmw_tt->sgt, vsgt->pages, + vsgt->num_pages, 0, + (unsigned long) vsgt->num_pages << PAGE_SHIFT, + dma_get_max_seg_size(dev_priv->dev->dev), + NULL, 0, GFP_KERNEL); + if (IS_ERR(sg)) { + ret = PTR_ERR(sg); + goto out_sg_alloc_fail; + } + + if (vsgt->num_pages > vmw_tt->sgt.orig_nents) { + uint64_t over_alloc = + sgl_size * (vsgt->num_pages - + vmw_tt->sgt.orig_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; +} + +/** + * 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; +} + + +static int vmw_ttm_bind(struct ttm_bo_device *bdev, + struct ttm_tt *ttm, struct ttm_resource *bo_mem) +{ + struct vmw_ttm_tt *vmw_be = + container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm); + int ret = 0; + + if (!bo_mem) + return -EINVAL; + + if (vmw_be->bound) + return 0; + + ret = vmw_ttm_map_dma(vmw_be); + if (unlikely(ret != 0)) + return ret; + + vmw_be->gmr_id = bo_mem->start; + vmw_be->mem_type = bo_mem->mem_type; + + switch (bo_mem->mem_type) { + case VMW_PL_GMR: + ret = vmw_gmr_bind(vmw_be->dev_priv, &vmw_be->vsgt, + ttm->num_pages, vmw_be->gmr_id); + break; + 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; + } + + ret = vmw_mob_bind(vmw_be->dev_priv, vmw_be->mob, + &vmw_be->vsgt, ttm->num_pages, + vmw_be->gmr_id); + break; + default: + BUG(); + } + vmw_be->bound = true; + return ret; +} + +static void vmw_ttm_unbind(struct ttm_bo_device *bdev, + struct ttm_tt *ttm) +{ + struct vmw_ttm_tt *vmw_be = + container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm); + + if (!vmw_be->bound) + return; + + 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(); + } + + if (vmw_be->dev_priv->map_mode == vmw_dma_map_bind) + vmw_ttm_unmap_dma(vmw_be); + vmw_be->bound = false; +} + + +static void vmw_ttm_destroy(struct ttm_bo_device *bdev, struct ttm_tt *ttm) +{ + struct vmw_ttm_tt *vmw_be = + container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm); + + vmw_ttm_unbind(bdev, ttm); + ttm_tt_destroy_common(bdev, 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); + + if (vmw_be->mob) + vmw_mob_destroy(vmw_be->mob); + + kfree(vmw_be); +} + + +static int vmw_ttm_populate(struct ttm_bo_device *bdev, + struct ttm_tt *ttm, struct ttm_operation_ctx *ctx) +{ + 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_tt_is_populated(ttm)) + 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, ctx); + if (unlikely(ret != 0)) + return ret; + + ret = ttm_dma_populate(&vmw_tt->dma_ttm, dev_priv->dev->dev, + ctx); + if (unlikely(ret != 0)) + ttm_mem_global_free(glob, size); + } else + ret = ttm_pool_populate(ttm, ctx); + + return ret; +} + +static void vmw_ttm_unpopulate(struct ttm_bo_device *bdev, + 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); + + + if (vmw_tt->mob) { + vmw_mob_destroy(vmw_tt->mob); + vmw_tt->mob = NULL; + } + + 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); +} + +static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo, + uint32_t page_flags) +{ + struct vmw_ttm_tt *vmw_be; + int ret; + + vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL); + if (!vmw_be) + return NULL; + + vmw_be->dev_priv = container_of(bo->bdev, struct vmw_private, bdev); + vmw_be->mob = NULL; + + if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent) + ret = ttm_dma_tt_init(&vmw_be->dma_ttm, bo, page_flags); + else + ret = ttm_tt_init(&vmw_be->dma_ttm.ttm, bo, page_flags); + if (unlikely(ret != 0)) + goto out_no_init; + + return &vmw_be->dma_ttm.ttm; +out_no_init: + kfree(vmw_be); + return NULL; +} + +static void vmw_evict_flags(struct ttm_buffer_object *bo, + struct ttm_placement *placement) +{ + *placement = vmw_sys_placement; +} + +static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp) +{ + struct ttm_object_file *tfile = + vmw_fpriv((struct drm_file *)filp->private_data)->tfile; + + return vmw_user_bo_verify_access(bo, tfile); +} + +static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_resource *mem) +{ + struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev); + + switch (mem->mem_type) { + case TTM_PL_SYSTEM: + case VMW_PL_GMR: + case VMW_PL_MOB: + return 0; + case TTM_PL_VRAM: + mem->bus.offset = (mem->start << PAGE_SHIFT) + + dev_priv->vram_start; + mem->bus.is_iomem = true; + break; + default: + return -EINVAL; + } + return 0; +} + +/** + * vmw_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. + * + * Calls move_notify for all subsystems needing it. + * (currently only resources). + */ +static void vmw_move_notify(struct ttm_buffer_object *bo, + bool evict, + struct ttm_resource *mem) +{ + vmw_bo_move_notify(bo, mem); + vmw_query_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) +{ + vmw_bo_swap_notify(bo); + (void) ttm_bo_wait(bo, false, false); +} + + +struct ttm_bo_driver vmw_bo_driver = { + .ttm_tt_create = &vmw_ttm_tt_create, + .ttm_tt_populate = &vmw_ttm_populate, + .ttm_tt_unpopulate = &vmw_ttm_unpopulate, + .ttm_tt_bind = &vmw_ttm_bind, + .ttm_tt_unbind = &vmw_ttm_unbind, + .ttm_tt_destroy = &vmw_ttm_destroy, + .eviction_valuable = ttm_bo_eviction_valuable, + .evict_flags = vmw_evict_flags, + .move = NULL, + .verify_access = vmw_verify_access, + .move_notify = vmw_move_notify, + .swap_notify = vmw_swap_notify, + .io_mem_reserve = &vmw_ttm_io_mem_reserve, +}; + +int vmw_bo_create_and_populate(struct vmw_private *dev_priv, + unsigned long bo_size, + struct ttm_buffer_object **bo_p) +{ + struct ttm_operation_ctx ctx = { + .interruptible = false, + .no_wait_gpu = false + }; + struct ttm_buffer_object *bo; + int ret; + + ret = ttm_bo_create(&dev_priv->bdev, bo_size, + ttm_bo_type_device, + &vmw_sys_ne_placement, + 0, false, &bo); + + if (unlikely(ret != 0)) + return ret; + + ret = ttm_bo_reserve(bo, false, true, NULL); + BUG_ON(ret != 0); + ret = vmw_ttm_populate(bo->bdev, bo->ttm, &ctx); + if (likely(ret == 0)) { + struct vmw_ttm_tt *vmw_tt = + container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm); + ret = vmw_ttm_map_dma(vmw_tt); + } + + ttm_bo_unreserve(bo); + + if (likely(ret == 0)) + *bo_p = bo; + return ret; +} |