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Diffstat (limited to 'src/VBox/Additions/linux/drm/vbox_ttm.c')
-rw-r--r--src/VBox/Additions/linux/drm/vbox_ttm.c550
1 files changed, 550 insertions, 0 deletions
diff --git a/src/VBox/Additions/linux/drm/vbox_ttm.c b/src/VBox/Additions/linux/drm/vbox_ttm.c
new file mode 100644
index 00000000..ec615787
--- /dev/null
+++ b/src/VBox/Additions/linux/drm/vbox_ttm.c
@@ -0,0 +1,550 @@
+/* $Id: vbox_ttm.c $ */
+/** @file
+ * VirtualBox Additions Linux kernel video driver
+ */
+
+/*
+ * Copyright (C) 2013-2019 Oracle Corporation
+ * This file is based on ast_ttm.c
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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 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.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ *
+ * Authors: Dave Airlie <airlied@redhat.com>
+ * Michael Thayer <michael.thayer@oracle.com>
+ */
+#include "vbox_drv.h"
+#include <ttm/ttm_page_alloc.h>
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 0) && !defined(RHEL_72)
+#define PLACEMENT_FLAGS(placement) (placement)
+#else
+#define PLACEMENT_FLAGS(placement) ((placement).flags)
+#endif
+
+static inline struct vbox_private *vbox_bdev(struct ttm_bo_device *bd)
+{
+ return container_of(bd, struct vbox_private, ttm.bdev);
+}
+
+static int vbox_ttm_mem_global_init(struct drm_global_reference *ref)
+{
+ return ttm_mem_global_init(ref->object);
+}
+
+static void vbox_ttm_mem_global_release(struct drm_global_reference *ref)
+{
+ ttm_mem_global_release(ref->object);
+}
+
+/**
+ * Adds the vbox memory manager object/structures to the global memory manager.
+ */
+static int vbox_ttm_global_init(struct vbox_private *vbox)
+{
+ struct drm_global_reference *global_ref;
+ int ret;
+
+ global_ref = &vbox->ttm.mem_global_ref;
+ global_ref->global_type = DRM_GLOBAL_TTM_MEM;
+ global_ref->size = sizeof(struct ttm_mem_global);
+ global_ref->init = &vbox_ttm_mem_global_init;
+ global_ref->release = &vbox_ttm_mem_global_release;
+ ret = drm_global_item_ref(global_ref);
+ if (ret) {
+ DRM_ERROR("Failed setting up TTM memory subsystem.\n");
+ return ret;
+ }
+
+ vbox->ttm.bo_global_ref.mem_glob = vbox->ttm.mem_global_ref.object;
+ global_ref = &vbox->ttm.bo_global_ref.ref;
+ global_ref->global_type = DRM_GLOBAL_TTM_BO;
+ global_ref->size = sizeof(struct ttm_bo_global);
+ global_ref->init = &ttm_bo_global_init;
+ global_ref->release = &ttm_bo_global_release;
+
+ ret = drm_global_item_ref(global_ref);
+ if (ret) {
+ DRM_ERROR("Failed setting up TTM BO subsystem.\n");
+ drm_global_item_unref(&vbox->ttm.mem_global_ref);
+ return ret;
+ }
+
+ return 0;
+}
+
+/**
+ * Removes the vbox memory manager object from the global memory manager.
+ */
+static void vbox_ttm_global_release(struct vbox_private *vbox)
+{
+ drm_global_item_unref(&vbox->ttm.bo_global_ref.ref);
+ drm_global_item_unref(&vbox->ttm.mem_global_ref);
+}
+
+static void vbox_bo_ttm_destroy(struct ttm_buffer_object *tbo)
+{
+ struct vbox_bo *bo;
+
+ bo = container_of(tbo, struct vbox_bo, bo);
+
+ drm_gem_object_release(&bo->gem);
+ kfree(bo);
+}
+
+static bool vbox_ttm_bo_is_vbox_bo(struct ttm_buffer_object *bo)
+{
+ if (bo->destroy == &vbox_bo_ttm_destroy)
+ return true;
+
+ return false;
+}
+
+static int
+vbox_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type,
+ struct ttm_mem_type_manager *man)
+{
+ switch (type) {
+ case TTM_PL_SYSTEM:
+ man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
+ man->available_caching = TTM_PL_MASK_CACHING;
+ man->default_caching = TTM_PL_FLAG_CACHED;
+ break;
+ case TTM_PL_VRAM:
+ man->func = &ttm_bo_manager_func;
+ man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
+ man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
+ man->default_caching = TTM_PL_FLAG_WC;
+ break;
+ default:
+ DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void
+vbox_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
+{
+ struct vbox_bo *vboxbo = vbox_bo(bo);
+
+ if (!vbox_ttm_bo_is_vbox_bo(bo))
+ return;
+
+ vbox_ttm_placement(vboxbo, TTM_PL_FLAG_SYSTEM);
+ *pl = vboxbo->placement;
+}
+
+static int vbox_bo_verify_access(struct ttm_buffer_object *bo,
+ struct file *filp)
+{
+ return 0;
+}
+
+static int vbox_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 vbox_private *vbox = vbox_bdev(bdev);
+
+ mem->bus.addr = NULL;
+ mem->bus.offset = 0;
+ mem->bus.size = mem->num_pages << PAGE_SHIFT;
+ mem->bus.base = 0;
+ mem->bus.is_iomem = false;
+ if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
+ return -EINVAL;
+ switch (mem->mem_type) {
+ case TTM_PL_SYSTEM:
+ /* system memory */
+ return 0;
+ case TTM_PL_VRAM:
+ mem->bus.offset = mem->start << PAGE_SHIFT;
+ mem->bus.base = pci_resource_start(vbox->dev->pdev, 0);
+ mem->bus.is_iomem = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void vbox_ttm_io_mem_free(struct ttm_bo_device *bdev,
+ struct ttm_mem_reg *mem)
+{
+}
+
+static void vbox_ttm_backend_destroy(struct ttm_tt *tt)
+{
+ ttm_tt_fini(tt);
+ kfree(tt);
+}
+
+static struct ttm_backend_func vbox_tt_backend_func = {
+ .destroy = &vbox_ttm_backend_destroy,
+};
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0)) && !defined(RHEL_76)
+static struct ttm_tt *vbox_ttm_tt_create(struct ttm_bo_device *bdev,
+ unsigned long size,
+ u32 page_flags,
+ struct page *dummy_read_page)
+#else
+static struct ttm_tt *vbox_ttm_tt_create(struct ttm_buffer_object *bo,
+ u32 page_flags)
+#endif
+{
+ struct ttm_tt *tt;
+
+ tt = kzalloc(sizeof(*tt), GFP_KERNEL);
+ if (!tt)
+ return NULL;
+
+ tt->func = &vbox_tt_backend_func;
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0)) && !defined(RHEL_76)
+ if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
+#else
+ if (ttm_tt_init(tt, bo, page_flags)) {
+#endif
+ kfree(tt);
+ return NULL;
+ }
+
+ return tt;
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0)
+# if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)) && !defined(RHEL_76)
+static int vbox_ttm_tt_populate(struct ttm_tt *ttm)
+{
+ return ttm_pool_populate(ttm);
+}
+# else
+static int vbox_ttm_tt_populate(struct ttm_tt *ttm,
+ struct ttm_operation_ctx *ctx)
+{
+ return ttm_pool_populate(ttm, ctx);
+}
+# endif
+
+static void vbox_ttm_tt_unpopulate(struct ttm_tt *ttm)
+{
+ ttm_pool_unpopulate(ttm);
+}
+#endif
+
+static struct ttm_bo_driver vbox_bo_driver = {
+ .ttm_tt_create = vbox_ttm_tt_create,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0)
+ .ttm_tt_populate = vbox_ttm_tt_populate,
+ .ttm_tt_unpopulate = vbox_ttm_tt_unpopulate,
+#endif
+ .init_mem_type = vbox_bo_init_mem_type,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0) || defined(RHEL_74)
+ .eviction_valuable = ttm_bo_eviction_valuable,
+#endif
+ .evict_flags = vbox_bo_evict_flags,
+ .verify_access = vbox_bo_verify_access,
+ .io_mem_reserve = &vbox_ttm_io_mem_reserve,
+ .io_mem_free = &vbox_ttm_io_mem_free,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0) || defined(RHEL_75)
+# if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)) && !defined(RHEL_76)
+ .io_mem_pfn = ttm_bo_default_io_mem_pfn,
+# endif
+#endif
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0) && LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 0)) \
+ || defined(RHEL_74)
+# ifndef RHEL_75
+ .lru_tail = &ttm_bo_default_lru_tail,
+ .swap_lru_tail = &ttm_bo_default_swap_lru_tail,
+# endif
+#endif
+};
+
+int vbox_mm_init(struct vbox_private *vbox)
+{
+ int ret;
+ struct drm_device *dev = vbox->dev;
+ struct ttm_bo_device *bdev = &vbox->ttm.bdev;
+
+ ret = vbox_ttm_global_init(vbox);
+ if (ret)
+ return ret;
+
+ ret = ttm_bo_device_init(&vbox->ttm.bdev,
+ vbox->ttm.bo_global_ref.ref.object,
+ &vbox_bo_driver,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 15, 0) || defined(RHEL_71)
+ dev->anon_inode->i_mapping,
+#endif
+ DRM_FILE_PAGE_OFFSET, true);
+ if (ret) {
+ DRM_ERROR("Error initialising bo driver; %d\n", ret);
+ goto err_ttm_global_release;
+ }
+
+ ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
+ vbox->available_vram_size >> PAGE_SHIFT);
+ if (ret) {
+ DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
+ goto err_device_release;
+ }
+
+#ifdef DRM_MTRR_WC
+ vbox->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
+ pci_resource_len(dev->pdev, 0),
+ DRM_MTRR_WC);
+#else
+ vbox->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
+ pci_resource_len(dev->pdev, 0));
+#endif
+ return 0;
+
+err_device_release:
+ ttm_bo_device_release(&vbox->ttm.bdev);
+err_ttm_global_release:
+ vbox_ttm_global_release(vbox);
+ return ret;
+}
+
+void vbox_mm_fini(struct vbox_private *vbox)
+{
+#ifdef DRM_MTRR_WC
+ drm_mtrr_del(vbox->fb_mtrr,
+ pci_resource_start(vbox->dev->pdev, 0),
+ pci_resource_len(vbox->dev->pdev, 0), DRM_MTRR_WC);
+#else
+ arch_phys_wc_del(vbox->fb_mtrr);
+#endif
+ ttm_bo_device_release(&vbox->ttm.bdev);
+ vbox_ttm_global_release(vbox);
+}
+
+void vbox_ttm_placement(struct vbox_bo *bo, int domain)
+{
+ u32 c = 0;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 0) && !defined(RHEL_72)
+ bo->placement.fpfn = 0;
+ bo->placement.lpfn = 0;
+#else
+ unsigned int i;
+#endif
+
+ bo->placement.placement = bo->placements;
+ bo->placement.busy_placement = bo->placements;
+
+ if (domain & TTM_PL_FLAG_VRAM)
+ PLACEMENT_FLAGS(bo->placements[c++]) =
+ TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
+ if (domain & TTM_PL_FLAG_SYSTEM)
+ PLACEMENT_FLAGS(bo->placements[c++]) =
+ TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
+ if (!c)
+ PLACEMENT_FLAGS(bo->placements[c++]) =
+ TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
+
+ bo->placement.num_placement = c;
+ bo->placement.num_busy_placement = c;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0) || defined(RHEL_72)
+ for (i = 0; i < c; ++i) {
+ bo->placements[i].fpfn = 0;
+ bo->placements[i].lpfn = 0;
+ }
+#endif
+}
+
+int vbox_bo_create(struct drm_device *dev, int size, int align,
+ u32 flags, struct vbox_bo **pvboxbo)
+{
+ struct vbox_private *vbox = dev->dev_private;
+ struct vbox_bo *vboxbo;
+ size_t acc_size;
+ int ret;
+
+ vboxbo = kzalloc(sizeof(*vboxbo), GFP_KERNEL);
+ if (!vboxbo)
+ return -ENOMEM;
+
+ ret = drm_gem_object_init(dev, &vboxbo->gem, size);
+ if (ret)
+ goto err_free_vboxbo;
+
+ vboxbo->bo.bdev = &vbox->ttm.bdev;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0) && !defined(RHEL_71)
+ vboxbo->bo.bdev->dev_mapping = dev->dev_mapping;
+#endif
+
+ vbox_ttm_placement(vboxbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
+
+ acc_size = ttm_bo_dma_acc_size(&vbox->ttm.bdev, size,
+ sizeof(struct vbox_bo));
+
+ ret = ttm_bo_init(&vbox->ttm.bdev, &vboxbo->bo, size,
+ ttm_bo_type_device, &vboxbo->placement,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0) && !defined(RHEL_76)
+ align >> PAGE_SHIFT, false, NULL, acc_size,
+#else
+ align >> PAGE_SHIFT, false, acc_size,
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0) || defined(RHEL_72)
+ NULL, NULL, vbox_bo_ttm_destroy);
+#else
+ NULL, vbox_bo_ttm_destroy);
+#endif
+ if (ret)
+ goto err_free_vboxbo;
+
+ *pvboxbo = vboxbo;
+
+ return 0;
+
+err_free_vboxbo:
+ kfree(vboxbo);
+ return ret;
+}
+
+static inline u64 vbox_bo_gpu_offset(struct vbox_bo *bo)
+{
+ return bo->bo.offset;
+}
+
+int vbox_bo_pin(struct vbox_bo *bo, u32 pl_flag, u64 *gpu_addr)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 16, 0)) || defined(RHEL_76)
+ struct ttm_operation_ctx ctx = { false, false };
+#endif
+ int i, ret;
+
+ if (bo->pin_count) {
+ bo->pin_count++;
+ if (gpu_addr)
+ *gpu_addr = vbox_bo_gpu_offset(bo);
+
+ return 0;
+ }
+
+ vbox_ttm_placement(bo, pl_flag);
+
+ for (i = 0; i < bo->placement.num_placement; i++)
+ PLACEMENT_FLAGS(bo->placements[i]) |= TTM_PL_FLAG_NO_EVICT;
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)) && !defined(RHEL_76)
+ ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
+#else
+ ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
+#endif
+ if (ret)
+ return ret;
+
+ bo->pin_count = 1;
+
+ if (gpu_addr)
+ *gpu_addr = vbox_bo_gpu_offset(bo);
+
+ return 0;
+}
+
+int vbox_bo_unpin(struct vbox_bo *bo)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 16, 0)) || defined(RHEL_76)
+ struct ttm_operation_ctx ctx = { false, false };
+#endif
+ int i, ret;
+
+ if (!bo->pin_count) {
+ DRM_ERROR("unpin bad %p\n", bo);
+ return 0;
+ }
+ bo->pin_count--;
+ if (bo->pin_count)
+ return 0;
+
+ for (i = 0; i < bo->placement.num_placement; i++)
+ PLACEMENT_FLAGS(bo->placements[i]) &= ~TTM_PL_FLAG_NO_EVICT;
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)) && !defined(RHEL_76)
+ ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
+#else
+ ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
+#endif
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+/*
+ * Move a vbox-owned buffer object to system memory if no one else has it
+ * pinned. The caller must have pinned it previously, and this call will
+ * release the caller's pin.
+ */
+int vbox_bo_push_sysram(struct vbox_bo *bo)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 16, 0)) || defined(RHEL_76)
+ struct ttm_operation_ctx ctx = { false, false };
+#endif
+ int i, ret;
+
+ if (!bo->pin_count) {
+ DRM_ERROR("unpin bad %p\n", bo);
+ return 0;
+ }
+ bo->pin_count--;
+ if (bo->pin_count)
+ return 0;
+
+ if (bo->kmap.virtual)
+ ttm_bo_kunmap(&bo->kmap);
+
+ vbox_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
+
+ for (i = 0; i < bo->placement.num_placement; i++)
+ PLACEMENT_FLAGS(bo->placements[i]) |= TTM_PL_FLAG_NO_EVICT;
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)) && !defined(RHEL_76)
+ ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
+#else
+ ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
+#endif
+ if (ret) {
+ DRM_ERROR("pushing to VRAM failed\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+int vbox_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+ struct drm_file *file_priv;
+ struct vbox_private *vbox;
+
+ if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
+ return -EINVAL;
+
+ file_priv = filp->private_data;
+ vbox = file_priv->minor->dev->dev_private;
+
+ return ttm_bo_mmap(filp, vma, &vbox->ttm.bdev);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 09:18:59 +0000