--- /dev/null
+/*
+ * 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>
+ */
+#include <drm/drmP.h>
+#include "cirrus_drv.h"
+#include <ttm/ttm_page_alloc.h>
+
+static inline struct cirrus_device *
+cirrus_bdev(struct ttm_bo_device *bd)
+{
+ return container_of(bd, struct cirrus_device, ttm.bdev);
+}
+
+static int
+cirrus_ttm_mem_global_init(struct drm_global_reference *ref)
+{
+ return ttm_mem_global_init(ref->object);
+}
+
+static void
+cirrus_ttm_mem_global_release(struct drm_global_reference *ref)
+{
+ ttm_mem_global_release(ref->object);
+}
+
+static int cirrus_ttm_global_init(struct cirrus_device *cirrus)
+{
+ struct drm_global_reference *global_ref;
+ int r;
+
+ global_ref = &cirrus->ttm.mem_global_ref;
+ global_ref->global_type = DRM_GLOBAL_TTM_MEM;
+ global_ref->size = sizeof(struct ttm_mem_global);
+ global_ref->init = &cirrus_ttm_mem_global_init;
+ global_ref->release = &cirrus_ttm_mem_global_release;
+ r = drm_global_item_ref(global_ref);
+ if (r != 0) {
+ DRM_ERROR("Failed setting up TTM memory accounting "
+ "subsystem.\n");
+ return r;
+ }
+
+ cirrus->ttm.bo_global_ref.mem_glob =
+ cirrus->ttm.mem_global_ref.object;
+ global_ref = &cirrus->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;
+ r = drm_global_item_ref(global_ref);
+ if (r != 0) {
+ DRM_ERROR("Failed setting up TTM BO subsystem.\n");
+ drm_global_item_unref(&cirrus->ttm.mem_global_ref);
+ return r;
+ }
+ return 0;
+}
+
+static void
+cirrus_ttm_global_release(struct cirrus_device *cirrus)
+{
+ if (cirrus->ttm.mem_global_ref.release == NULL)
+ return;
+
+ drm_global_item_unref(&cirrus->ttm.bo_global_ref.ref);
+ drm_global_item_unref(&cirrus->ttm.mem_global_ref);
+ cirrus->ttm.mem_global_ref.release = NULL;
+}
+
+
+static void cirrus_bo_ttm_destroy(struct ttm_buffer_object *tbo)
+{
+ struct cirrus_bo *bo;
+
+ bo = container_of(tbo, struct cirrus_bo, bo);
+
+ drm_gem_object_release(&bo->gem);
+ kfree(bo);
+}
+
+static bool cirrus_ttm_bo_is_cirrus_bo(struct ttm_buffer_object *bo)
+{
+ if (bo->destroy == &cirrus_bo_ttm_destroy)
+ return true;
+ return false;
+}
+
+static int
+cirrus_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t 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)type);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void
+cirrus_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
+{
+ struct cirrus_bo *cirrusbo = cirrus_bo(bo);
+
+ if (!cirrus_ttm_bo_is_cirrus_bo(bo))
+ return;
+
+ cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_SYSTEM);
+ *pl = cirrusbo->placement;
+}
+
+static int cirrus_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
+{
+ struct cirrus_bo *cirrusbo = cirrus_bo(bo);
+
+ return drm_vma_node_verify_access(&cirrusbo->gem.vma_node, filp);
+}
+
+static int cirrus_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 cirrus_device *cirrus = cirrus_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(cirrus->dev->pdev, 0);
+ mem->bus.is_iomem = true;
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+ return 0;
+}
+
+static void cirrus_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+}
+
+static int cirrus_bo_move(struct ttm_buffer_object *bo,
+ bool evict, bool interruptible,
+ bool no_wait_gpu,
+ struct ttm_mem_reg *new_mem)
+{
+ int r;
+ r = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
+ return r;
+}
+
+
+static void cirrus_ttm_backend_destroy(struct ttm_tt *tt)
+{
+ ttm_tt_fini(tt);
+ kfree(tt);
+}
+
+static struct ttm_backend_func cirrus_tt_backend_func = {
+ .destroy = &cirrus_ttm_backend_destroy,
+};
+
+
+static struct ttm_tt *cirrus_ttm_tt_create(struct ttm_bo_device *bdev,
+ unsigned long size, uint32_t page_flags,
+ struct page *dummy_read_page)
+{
+ struct ttm_tt *tt;
+
+ tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
+ if (tt == NULL)
+ return NULL;
+ tt->func = &cirrus_tt_backend_func;
+ if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
+ kfree(tt);
+ return NULL;
+ }
+ return tt;
+}
+
+static int cirrus_ttm_tt_populate(struct ttm_tt *ttm)
+{
+ return ttm_pool_populate(ttm);
+}
+
+static void cirrus_ttm_tt_unpopulate(struct ttm_tt *ttm)
+{
+ ttm_pool_unpopulate(ttm);
+}
+
+struct ttm_bo_driver cirrus_bo_driver = {
+ .ttm_tt_create = cirrus_ttm_tt_create,
+ .ttm_tt_populate = cirrus_ttm_tt_populate,
+ .ttm_tt_unpopulate = cirrus_ttm_tt_unpopulate,
+ .init_mem_type = cirrus_bo_init_mem_type,
+ .evict_flags = cirrus_bo_evict_flags,
+ .move = cirrus_bo_move,
+ .verify_access = cirrus_bo_verify_access,
+ .io_mem_reserve = &cirrus_ttm_io_mem_reserve,
+ .io_mem_free = &cirrus_ttm_io_mem_free,
+};
+
+int cirrus_mm_init(struct cirrus_device *cirrus)
+{
+ int ret;
+ struct drm_device *dev = cirrus->dev;
+ struct ttm_bo_device *bdev = &cirrus->ttm.bdev;
+
+ ret = cirrus_ttm_global_init(cirrus);
+ if (ret)
+ return ret;
+
+ ret = ttm_bo_device_init(&cirrus->ttm.bdev,
+ cirrus->ttm.bo_global_ref.ref.object,
+ &cirrus_bo_driver,
+ dev->anon_inode->i_mapping,
+ DRM_FILE_PAGE_OFFSET,
+ true);
+ if (ret) {
+ DRM_ERROR("Error initialising bo driver; %d\n", ret);
+ return ret;
+ }
+
+ ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
+ cirrus->mc.vram_size >> PAGE_SHIFT);
+ if (ret) {
+ DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
+ return ret;
+ }
+
+ cirrus->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
+ pci_resource_len(dev->pdev, 0));
+
+ cirrus->mm_inited = true;
+ return 0;
+}
+
+void cirrus_mm_fini(struct cirrus_device *cirrus)
+{
+ if (!cirrus->mm_inited)
+ return;
+
+ ttm_bo_device_release(&cirrus->ttm.bdev);
+
+ cirrus_ttm_global_release(cirrus);
+
+ arch_phys_wc_del(cirrus->fb_mtrr);
+ cirrus->fb_mtrr = 0;
+}
+
+void cirrus_ttm_placement(struct cirrus_bo *bo, int domain)
+{
+ u32 c = 0;
+ unsigned i;
+ bo->placement.placement = bo->placements;
+ bo->placement.busy_placement = bo->placements;
+ if (domain & TTM_PL_FLAG_VRAM)
+ bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
+ if (domain & TTM_PL_FLAG_SYSTEM)
+ bo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
+ if (!c)
+ bo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
+ bo->placement.num_placement = c;
+ bo->placement.num_busy_placement = c;
+ for (i = 0; i < c; ++i) {
+ bo->placements[i].fpfn = 0;
+ bo->placements[i].lpfn = 0;
+ }
+}
+
+int cirrus_bo_create(struct drm_device *dev, int size, int align,
+ uint32_t flags, struct cirrus_bo **pcirrusbo)
+{
+ struct cirrus_device *cirrus = dev->dev_private;
+ struct cirrus_bo *cirrusbo;
+ size_t acc_size;
+ int ret;
+
+ cirrusbo = kzalloc(sizeof(struct cirrus_bo), GFP_KERNEL);
+ if (!cirrusbo)
+ return -ENOMEM;
+
+ ret = drm_gem_object_init(dev, &cirrusbo->gem, size);
+ if (ret) {
+ kfree(cirrusbo);
+ return ret;
+ }
+
+ cirrusbo->bo.bdev = &cirrus->ttm.bdev;
+
+ cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
+
+ acc_size = ttm_bo_dma_acc_size(&cirrus->ttm.bdev, size,
+ sizeof(struct cirrus_bo));
+
+ ret = ttm_bo_init(&cirrus->ttm.bdev, &cirrusbo->bo, size,
+ ttm_bo_type_device, &cirrusbo->placement,
+ align >> PAGE_SHIFT, false, NULL, acc_size,
+ NULL, NULL, cirrus_bo_ttm_destroy);
+ if (ret)
+ return ret;
+
+ *pcirrusbo = cirrusbo;
+ return 0;
+}
+
+static inline u64 cirrus_bo_gpu_offset(struct cirrus_bo *bo)
+{
+ return bo->bo.offset;
+}
+
+int cirrus_bo_pin(struct cirrus_bo *bo, u32 pl_flag, u64 *gpu_addr)
+{
+ int i, ret;
+
+ if (bo->pin_count) {
+ bo->pin_count++;
+ if (gpu_addr)
+ *gpu_addr = cirrus_bo_gpu_offset(bo);
+ }
+
+ cirrus_ttm_placement(bo, pl_flag);
+ for (i = 0; i < bo->placement.num_placement; i++)
+ bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
+ ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
+ if (ret)
+ return ret;
+
+ bo->pin_count = 1;
+ if (gpu_addr)
+ *gpu_addr = cirrus_bo_gpu_offset(bo);
+ return 0;
+}
+
+int cirrus_bo_push_sysram(struct cirrus_bo *bo)
+{
+ 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);
+
+ cirrus_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
+ for (i = 0; i < bo->placement.num_placement ; i++)
+ bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
+
+ ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
+ if (ret) {
+ DRM_ERROR("pushing to VRAM failed\n");
+ return ret;
+ }
+ return 0;
+}
+
+int cirrus_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+ struct drm_file *file_priv;
+ struct cirrus_device *cirrus;
+
+ if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
+ return -EINVAL;
+
+ file_priv = filp->private_data;
+ cirrus = file_priv->minor->dev->dev_private;
+ return ttm_bo_mmap(filp, vma, &cirrus->ttm.bdev);
+}
Code Review / kvmfornfv.git / blobdiff