1 files changed, 453 insertions, 0 deletions

diff --git a/drivers/gpu/drm/ast/ast_ttm.c b/drivers/gpu/drm/ast/ast_ttm.c
new file mode 100644
index 000000000000..aad12f747175
--- /dev/null
+++ b/drivers/gpu/drm/ast/ast_ttm.c
@@ -0,0 +1,453 @@
+/*
+ * 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 "drmP.h"
+#include "ast_drv.h"
+#include <ttm/ttm_page_alloc.h>
+
+static inline struct ast_private *
+ast_bdev(struct ttm_bo_device *bd)
+{
+        return container_of(bd, struct ast_private, ttm.bdev);
+}
+
+static int
+ast_ttm_mem_global_init(struct drm_global_reference *ref)
+{
+        return ttm_mem_global_init(ref->object);
+}
+
+static void
+ast_ttm_mem_global_release(struct drm_global_reference *ref)
+{
+        ttm_mem_global_release(ref->object);
+}
+
+static int ast_ttm_global_init(struct ast_private *ast)
+{
+        struct drm_global_reference *global_ref;
+        int r;
+
+        global_ref = &ast->ttm.mem_global_ref;
+        global_ref->global_type = DRM_GLOBAL_TTM_MEM;
+        global_ref->size = sizeof(struct ttm_mem_global);
+        global_ref->init = &ast_ttm_mem_global_init;
+        global_ref->release = &ast_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;
+        }
+
+        ast->ttm.bo_global_ref.mem_glob =
+                ast->ttm.mem_global_ref.object;
+        global_ref = &ast->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(&ast->ttm.mem_global_ref);
+                return r;
+        }
+        return 0;
+}
+
+void
+ast_ttm_global_release(struct ast_private *ast)
+{
+        if (ast->ttm.mem_global_ref.release == NULL)
+                return;
+
+        drm_global_item_unref(&ast->ttm.bo_global_ref.ref);
+        drm_global_item_unref(&ast->ttm.mem_global_ref);
+        ast->ttm.mem_global_ref.release = NULL;
+}
+
+
+static void ast_bo_ttm_destroy(struct ttm_buffer_object *tbo)
+{
+        struct ast_bo *bo;
+
+        bo = container_of(tbo, struct ast_bo, bo);
+
+        drm_gem_object_release(&bo->gem);
+        kfree(bo);
+}
+
+bool ast_ttm_bo_is_ast_bo(struct ttm_buffer_object *bo)
+{
+        if (bo->destroy == &ast_bo_ttm_destroy)
+                return true;
+        return false;
+}
+
+static int
+ast_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
+ast_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
+{
+        struct ast_bo *astbo = ast_bo(bo);
+
+        if (!ast_ttm_bo_is_ast_bo(bo))
+                return;
+
+        ast_ttm_placement(astbo, TTM_PL_FLAG_SYSTEM);
+        *pl = astbo->placement;
+}
+
+static int ast_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
+{
+        return 0;
+}
+
+static int ast_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 ast_private *ast = ast_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(ast->dev->pdev, 0);
+                mem->bus.is_iomem = true;
+                break;
+        default:
+                return -EINVAL;
+                break;
+        }
+        return 0;
+}
+
+static void ast_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+}
+
+static int ast_bo_move(struct ttm_buffer_object *bo,
+                       bool evict, bool interruptible,
+                       bool no_wait_reserve, bool no_wait_gpu,
+                       struct ttm_mem_reg *new_mem)
+{
+        int r;
+        r = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, new_mem);
+        return r;
+}
+
+
+static void ast_ttm_backend_destroy(struct ttm_tt *tt)
+{
+        ttm_tt_fini(tt);
+        kfree(tt);
+}
+
+static struct ttm_backend_func ast_tt_backend_func = {
+        .destroy = &ast_ttm_backend_destroy,
+};
+
+
+struct ttm_tt *ast_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 = &ast_tt_backend_func;
+        if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
+                kfree(tt);
+                return NULL;
+        }
+        return tt;
+}
+
+static int ast_ttm_tt_populate(struct ttm_tt *ttm)
+{
+        return ttm_pool_populate(ttm);
+}
+
+static void ast_ttm_tt_unpopulate(struct ttm_tt *ttm)
+{
+        ttm_pool_unpopulate(ttm);
+}
+
+struct ttm_bo_driver ast_bo_driver = {
+        .ttm_tt_create = ast_ttm_tt_create,
+        .ttm_tt_populate = ast_ttm_tt_populate,
+        .ttm_tt_unpopulate = ast_ttm_tt_unpopulate,
+        .init_mem_type = ast_bo_init_mem_type,
+        .evict_flags = ast_bo_evict_flags,
+        .move = ast_bo_move,
+        .verify_access = ast_bo_verify_access,
+        .io_mem_reserve = &ast_ttm_io_mem_reserve,
+        .io_mem_free = &ast_ttm_io_mem_free,
+};
+
+int ast_mm_init(struct ast_private *ast)
+{
+        int ret;
+        struct drm_device *dev = ast->dev;
+        struct ttm_bo_device *bdev = &ast->ttm.bdev;
+
+        ret = ast_ttm_global_init(ast);
+        if (ret)
+                return ret;
+
+        ret = ttm_bo_device_init(&ast->ttm.bdev,
+                                 ast->ttm.bo_global_ref.ref.object,
+                                 &ast_bo_driver, 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,
+                             ast->vram_size >> PAGE_SHIFT);
+        if (ret) {
+                DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
+                return ret;
+        }
+
+        ast->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
+                                    pci_resource_len(dev->pdev, 0),
+                                    DRM_MTRR_WC);
+
+        return 0;
+}
+
+void ast_mm_fini(struct ast_private *ast)
+{
+        struct drm_device *dev = ast->dev;
+        ttm_bo_device_release(&ast->ttm.bdev);
+
+        ast_ttm_global_release(ast);
+
+        if (ast->fb_mtrr >= 0) {
+                drm_mtrr_del(ast->fb_mtrr,
+                             pci_resource_start(dev->pdev, 0),
+                             pci_resource_len(dev->pdev, 0), DRM_MTRR_WC);
+                ast->fb_mtrr = -1;
+        }
+}
+
+void ast_ttm_placement(struct ast_bo *bo, int domain)
+{
+        u32 c = 0;
+        bo->placement.fpfn = 0;
+        bo->placement.lpfn = 0;
+        bo->placement.placement = bo->placements;
+        bo->placement.busy_placement = bo->placements;
+        if (domain & TTM_PL_FLAG_VRAM)
+                bo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
+        if (domain & TTM_PL_FLAG_SYSTEM)
+                bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
+        if (!c)
+                bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
+        bo->placement.num_placement = c;
+        bo->placement.num_busy_placement = c;
+}
+
+int ast_bo_reserve(struct ast_bo *bo, bool no_wait)
+{
+        int ret;
+
+        ret = ttm_bo_reserve(&bo->bo, true, no_wait, false, 0);
+        if (ret) {
+                if (ret != -ERESTARTSYS)
+                        DRM_ERROR("reserve failed %p\n", bo);
+                return ret;
+        }
+        return 0;
+}
+
+void ast_bo_unreserve(struct ast_bo *bo)
+{
+        ttm_bo_unreserve(&bo->bo);
+}
+
+int ast_bo_create(struct drm_device *dev, int size, int align,
+                  uint32_t flags, struct ast_bo **pastbo)
+{
+        struct ast_private *ast = dev->dev_private;
+        struct ast_bo *astbo;
+        size_t acc_size;
+        int ret;
+
+        astbo = kzalloc(sizeof(struct ast_bo), GFP_KERNEL);
+        if (!astbo)
+                return -ENOMEM;
+
+        ret = drm_gem_object_init(dev, &astbo->gem, size);
+        if (ret) {
+                kfree(astbo);
+                return ret;
+        }
+
+        astbo->gem.driver_private = NULL;
+        astbo->bo.bdev = &ast->ttm.bdev;
+
+        ast_ttm_placement(astbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
+
+        acc_size = ttm_bo_dma_acc_size(&ast->ttm.bdev, size,
+                                       sizeof(struct ast_bo));
+
+        ret = ttm_bo_init(&ast->ttm.bdev, &astbo->bo, size,
+                          ttm_bo_type_device, &astbo->placement,
+                          align >> PAGE_SHIFT, 0, false, NULL, acc_size,
+                          ast_bo_ttm_destroy);
+        if (ret)
+                return ret;
+
+        *pastbo = astbo;
+        return 0;
+}
+
+static inline u64 ast_bo_gpu_offset(struct ast_bo *bo)
+{
+        return bo->bo.offset;
+}
+
+int ast_bo_pin(struct ast_bo *bo, u32 pl_flag, u64 *gpu_addr)
+{
+        int i, ret;
+
+        if (bo->pin_count) {
+                bo->pin_count++;
+                if (gpu_addr)
+                        *gpu_addr = ast_bo_gpu_offset(bo);
+        }
+
+        ast_ttm_placement(bo, pl_flag);
+        for (i = 0; i < bo->placement.num_placement; i++)
+                bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
+        ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
+        if (ret)
+                return ret;
+
+        bo->pin_count = 1;
+        if (gpu_addr)
+                *gpu_addr = ast_bo_gpu_offset(bo);
+        return 0;
+}
+
+int ast_bo_unpin(struct ast_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;
+
+        for (i = 0; i < bo->placement.num_placement ; i++)
+                bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
+        ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
+        if (ret)
+                return ret;
+
+        return 0;
+}
+
+int ast_bo_push_sysram(struct ast_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);
+
+        ast_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
+        for (i = 0; i < bo->placement.num_placement ; i++)
+                bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
+
+        ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
+        if (ret) {
+                DRM_ERROR("pushing to VRAM failed\n");
+                return ret;
+        }
+        return 0;
+}
+
+int ast_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+        struct drm_file *file_priv;
+        struct ast_private *ast;
+
+        if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
+                return drm_mmap(filp, vma);
+
+        file_priv = filp->private_data;
+        ast = file_priv->minor->dev->dev_private;
+        return ttm_bo_mmap(filp, vma, &ast->ttm.bdev);
+}