453 lines
11 KiB
C
453 lines
11 KiB
C
/*
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* Copyright 2012 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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*/
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/*
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* Authors: Dave Airlie <airlied@redhat.com>
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*/
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#include <drm/drmP.h>
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#include "mgag200_drv.h"
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#include <ttm/ttm_page_alloc.h>
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static inline struct mga_device *
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mgag200_bdev(struct ttm_bo_device *bd)
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{
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return container_of(bd, struct mga_device, ttm.bdev);
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}
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static int
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mgag200_ttm_mem_global_init(struct drm_global_reference *ref)
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{
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return ttm_mem_global_init(ref->object);
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}
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static void
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mgag200_ttm_mem_global_release(struct drm_global_reference *ref)
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{
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ttm_mem_global_release(ref->object);
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}
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static int mgag200_ttm_global_init(struct mga_device *ast)
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{
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struct drm_global_reference *global_ref;
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int r;
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global_ref = &ast->ttm.mem_global_ref;
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global_ref->global_type = DRM_GLOBAL_TTM_MEM;
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global_ref->size = sizeof(struct ttm_mem_global);
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global_ref->init = &mgag200_ttm_mem_global_init;
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global_ref->release = &mgag200_ttm_mem_global_release;
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r = drm_global_item_ref(global_ref);
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if (r != 0) {
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DRM_ERROR("Failed setting up TTM memory accounting "
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"subsystem.\n");
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return r;
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}
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ast->ttm.bo_global_ref.mem_glob =
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ast->ttm.mem_global_ref.object;
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global_ref = &ast->ttm.bo_global_ref.ref;
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global_ref->global_type = DRM_GLOBAL_TTM_BO;
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global_ref->size = sizeof(struct ttm_bo_global);
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global_ref->init = &ttm_bo_global_init;
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global_ref->release = &ttm_bo_global_release;
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r = drm_global_item_ref(global_ref);
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if (r != 0) {
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DRM_ERROR("Failed setting up TTM BO subsystem.\n");
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drm_global_item_unref(&ast->ttm.mem_global_ref);
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return r;
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}
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return 0;
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}
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void
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mgag200_ttm_global_release(struct mga_device *ast)
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{
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if (ast->ttm.mem_global_ref.release == NULL)
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return;
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drm_global_item_unref(&ast->ttm.bo_global_ref.ref);
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drm_global_item_unref(&ast->ttm.mem_global_ref);
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ast->ttm.mem_global_ref.release = NULL;
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}
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static void mgag200_bo_ttm_destroy(struct ttm_buffer_object *tbo)
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{
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struct mgag200_bo *bo;
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bo = container_of(tbo, struct mgag200_bo, bo);
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drm_gem_object_release(&bo->gem);
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kfree(bo);
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}
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bool mgag200_ttm_bo_is_mgag200_bo(struct ttm_buffer_object *bo)
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{
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if (bo->destroy == &mgag200_bo_ttm_destroy)
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return true;
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return false;
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}
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static int
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mgag200_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
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struct ttm_mem_type_manager *man)
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{
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switch (type) {
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case TTM_PL_SYSTEM:
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man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
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man->available_caching = TTM_PL_MASK_CACHING;
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man->default_caching = TTM_PL_FLAG_CACHED;
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break;
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case TTM_PL_VRAM:
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man->func = &ttm_bo_manager_func;
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man->flags = TTM_MEMTYPE_FLAG_FIXED |
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TTM_MEMTYPE_FLAG_MAPPABLE;
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man->available_caching = TTM_PL_FLAG_UNCACHED |
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TTM_PL_FLAG_WC;
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man->default_caching = TTM_PL_FLAG_WC;
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break;
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default:
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DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
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return -EINVAL;
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}
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return 0;
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}
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static void
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mgag200_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
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{
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struct mgag200_bo *mgabo = mgag200_bo(bo);
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if (!mgag200_ttm_bo_is_mgag200_bo(bo))
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return;
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mgag200_ttm_placement(mgabo, TTM_PL_FLAG_SYSTEM);
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*pl = mgabo->placement;
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}
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static int mgag200_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
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{
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return 0;
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}
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static int mgag200_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
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struct ttm_mem_reg *mem)
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{
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struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
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struct mga_device *mdev = mgag200_bdev(bdev);
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mem->bus.addr = NULL;
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mem->bus.offset = 0;
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mem->bus.size = mem->num_pages << PAGE_SHIFT;
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mem->bus.base = 0;
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mem->bus.is_iomem = false;
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if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
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return -EINVAL;
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switch (mem->mem_type) {
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case TTM_PL_SYSTEM:
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/* system memory */
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return 0;
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case TTM_PL_VRAM:
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mem->bus.offset = mem->start << PAGE_SHIFT;
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mem->bus.base = pci_resource_start(mdev->dev->pdev, 0);
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mem->bus.is_iomem = true;
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break;
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default:
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return -EINVAL;
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break;
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}
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return 0;
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}
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static void mgag200_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
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{
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}
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static int mgag200_bo_move(struct ttm_buffer_object *bo,
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bool evict, bool interruptible,
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bool no_wait_reserve, bool no_wait_gpu,
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struct ttm_mem_reg *new_mem)
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{
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int r;
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r = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, new_mem);
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return r;
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}
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static void mgag200_ttm_backend_destroy(struct ttm_tt *tt)
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{
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ttm_tt_fini(tt);
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kfree(tt);
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}
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static struct ttm_backend_func mgag200_tt_backend_func = {
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.destroy = &mgag200_ttm_backend_destroy,
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};
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struct ttm_tt *mgag200_ttm_tt_create(struct ttm_bo_device *bdev,
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unsigned long size, uint32_t page_flags,
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struct page *dummy_read_page)
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{
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struct ttm_tt *tt;
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tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
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if (tt == NULL)
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return NULL;
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tt->func = &mgag200_tt_backend_func;
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if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
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kfree(tt);
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return NULL;
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}
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return tt;
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}
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static int mgag200_ttm_tt_populate(struct ttm_tt *ttm)
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{
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return ttm_pool_populate(ttm);
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}
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static void mgag200_ttm_tt_unpopulate(struct ttm_tt *ttm)
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{
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ttm_pool_unpopulate(ttm);
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}
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struct ttm_bo_driver mgag200_bo_driver = {
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.ttm_tt_create = mgag200_ttm_tt_create,
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.ttm_tt_populate = mgag200_ttm_tt_populate,
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.ttm_tt_unpopulate = mgag200_ttm_tt_unpopulate,
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.init_mem_type = mgag200_bo_init_mem_type,
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.evict_flags = mgag200_bo_evict_flags,
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.move = mgag200_bo_move,
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.verify_access = mgag200_bo_verify_access,
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.io_mem_reserve = &mgag200_ttm_io_mem_reserve,
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.io_mem_free = &mgag200_ttm_io_mem_free,
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};
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int mgag200_mm_init(struct mga_device *mdev)
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{
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int ret;
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struct drm_device *dev = mdev->dev;
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struct ttm_bo_device *bdev = &mdev->ttm.bdev;
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ret = mgag200_ttm_global_init(mdev);
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if (ret)
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return ret;
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ret = ttm_bo_device_init(&mdev->ttm.bdev,
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mdev->ttm.bo_global_ref.ref.object,
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&mgag200_bo_driver, DRM_FILE_PAGE_OFFSET,
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true);
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if (ret) {
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DRM_ERROR("Error initialising bo driver; %d\n", ret);
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return ret;
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}
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ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM, mdev->mc.vram_size >> PAGE_SHIFT);
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if (ret) {
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DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
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return ret;
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}
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mdev->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
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pci_resource_len(dev->pdev, 0),
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DRM_MTRR_WC);
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return 0;
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}
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void mgag200_mm_fini(struct mga_device *mdev)
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{
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struct drm_device *dev = mdev->dev;
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ttm_bo_device_release(&mdev->ttm.bdev);
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mgag200_ttm_global_release(mdev);
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if (mdev->fb_mtrr >= 0) {
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drm_mtrr_del(mdev->fb_mtrr,
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pci_resource_start(dev->pdev, 0),
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pci_resource_len(dev->pdev, 0), DRM_MTRR_WC);
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mdev->fb_mtrr = -1;
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}
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}
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void mgag200_ttm_placement(struct mgag200_bo *bo, int domain)
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{
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u32 c = 0;
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bo->placement.fpfn = 0;
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bo->placement.lpfn = 0;
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bo->placement.placement = bo->placements;
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bo->placement.busy_placement = bo->placements;
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if (domain & TTM_PL_FLAG_VRAM)
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bo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
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if (domain & TTM_PL_FLAG_SYSTEM)
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bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
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if (!c)
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bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
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bo->placement.num_placement = c;
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bo->placement.num_busy_placement = c;
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}
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int mgag200_bo_reserve(struct mgag200_bo *bo, bool no_wait)
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{
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int ret;
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ret = ttm_bo_reserve(&bo->bo, true, no_wait, false, 0);
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if (ret) {
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if (ret != -ERESTARTSYS)
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DRM_ERROR("reserve failed %p\n", bo);
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return ret;
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}
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return 0;
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}
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void mgag200_bo_unreserve(struct mgag200_bo *bo)
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{
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ttm_bo_unreserve(&bo->bo);
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}
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int mgag200_bo_create(struct drm_device *dev, int size, int align,
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uint32_t flags, struct mgag200_bo **pmgabo)
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{
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struct mga_device *mdev = dev->dev_private;
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struct mgag200_bo *mgabo;
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size_t acc_size;
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int ret;
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mgabo = kzalloc(sizeof(struct mgag200_bo), GFP_KERNEL);
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if (!mgabo)
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return -ENOMEM;
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ret = drm_gem_object_init(dev, &mgabo->gem, size);
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if (ret) {
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kfree(mgabo);
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return ret;
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}
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mgabo->gem.driver_private = NULL;
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mgabo->bo.bdev = &mdev->ttm.bdev;
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mgag200_ttm_placement(mgabo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
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acc_size = ttm_bo_dma_acc_size(&mdev->ttm.bdev, size,
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sizeof(struct mgag200_bo));
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ret = ttm_bo_init(&mdev->ttm.bdev, &mgabo->bo, size,
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ttm_bo_type_device, &mgabo->placement,
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align >> PAGE_SHIFT, 0, false, NULL, acc_size,
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NULL, mgag200_bo_ttm_destroy);
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if (ret)
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return ret;
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*pmgabo = mgabo;
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return 0;
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}
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static inline u64 mgag200_bo_gpu_offset(struct mgag200_bo *bo)
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{
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return bo->bo.offset;
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}
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int mgag200_bo_pin(struct mgag200_bo *bo, u32 pl_flag, u64 *gpu_addr)
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{
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int i, ret;
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if (bo->pin_count) {
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bo->pin_count++;
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if (gpu_addr)
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*gpu_addr = mgag200_bo_gpu_offset(bo);
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}
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mgag200_ttm_placement(bo, pl_flag);
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for (i = 0; i < bo->placement.num_placement; i++)
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bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
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ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
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if (ret)
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return ret;
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bo->pin_count = 1;
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if (gpu_addr)
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*gpu_addr = mgag200_bo_gpu_offset(bo);
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return 0;
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}
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int mgag200_bo_unpin(struct mgag200_bo *bo)
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{
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int i, ret;
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if (!bo->pin_count) {
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DRM_ERROR("unpin bad %p\n", bo);
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return 0;
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}
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bo->pin_count--;
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if (bo->pin_count)
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return 0;
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for (i = 0; i < bo->placement.num_placement ; i++)
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bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
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ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
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if (ret)
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return ret;
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return 0;
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}
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int mgag200_bo_push_sysram(struct mgag200_bo *bo)
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{
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int i, ret;
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if (!bo->pin_count) {
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DRM_ERROR("unpin bad %p\n", bo);
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return 0;
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}
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bo->pin_count--;
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if (bo->pin_count)
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return 0;
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if (bo->kmap.virtual)
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ttm_bo_kunmap(&bo->kmap);
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mgag200_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
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for (i = 0; i < bo->placement.num_placement ; i++)
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bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
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ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
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if (ret) {
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DRM_ERROR("pushing to VRAM failed\n");
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return ret;
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}
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return 0;
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}
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int mgag200_mmap(struct file *filp, struct vm_area_struct *vma)
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{
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struct drm_file *file_priv;
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struct mga_device *mdev;
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if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
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return drm_mmap(filp, vma);
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file_priv = filp->private_data;
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mdev = file_priv->minor->dev->dev_private;
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return ttm_bo_mmap(filp, vma, &mdev->ttm.bdev);
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}
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