drm/hisilicon/hibmc: Add video memory management
Hibmc have 32m video memory which can be accessed through PCIe by host, we use ttm to manage these memory. Signed-off-by: Rongrong Zou <zourongrong@gmail.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Reviewed-by: Xinliang Liu <xinliang.liu@linaro.org> Acked-by: Sean Paul <seanpaul@chromium.org>
This commit is contained in:
Rongrong Zou
parent
5e0df3a08f
commit
e4daebc77e
4 changed files with 541 additions and 1 deletions
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@ -1,4 +1,4 @@
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ccflags-y := -Iinclude/drm
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hibmc-drm-y := hibmc_drm_drv.o
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hibmc-drm-y := hibmc_drm_drv.o hibmc_ttm.o
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obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc-drm.o
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@ -28,6 +28,7 @@ static const struct file_operations hibmc_fops = {
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.release = drm_release,
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.unlocked_ioctl = drm_ioctl,
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.compat_ioctl = drm_compat_ioctl,
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.mmap = hibmc_mmap,
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.poll = drm_poll,
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.read = drm_read,
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.llseek = no_llseek,
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@ -43,6 +44,7 @@ static void hibmc_disable_vblank(struct drm_device *dev, unsigned int pipe)
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}
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static struct drm_driver hibmc_driver = {
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.driver_features = DRIVER_GEM,
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.fops = &hibmc_fops,
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.name = "hibmc",
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.date = "20160828",
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@ -52,6 +54,10 @@ static struct drm_driver hibmc_driver = {
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.get_vblank_counter = drm_vblank_no_hw_counter,
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.enable_vblank = hibmc_enable_vblank,
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.disable_vblank = hibmc_disable_vblank,
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.gem_free_object_unlocked = hibmc_gem_free_object,
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.dumb_create = hibmc_dumb_create,
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.dumb_map_offset = hibmc_dumb_mmap_offset,
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.dumb_destroy = drm_gem_dumb_destroy,
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};
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static int hibmc_pm_suspend(struct device *dev)
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@ -194,6 +200,10 @@ static int hibmc_hw_init(struct hibmc_drm_private *priv)
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static int hibmc_unload(struct drm_device *dev)
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{
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struct hibmc_drm_private *priv = dev->dev_private;
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hibmc_mm_fini(priv);
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dev->dev_private = NULL;
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return 0;
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}
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@ -214,6 +224,10 @@ static int hibmc_load(struct drm_device *dev)
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if (ret)
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goto err;
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ret = hibmc_mm_init(priv);
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if (ret)
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goto err;
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return 0;
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err:
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@ -20,6 +20,8 @@
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#define HIBMC_DRM_DRV_H
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#include <drm/drmP.h>
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#include <drm/drm_gem.h>
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#include <drm/ttm/ttm_bo_driver.h>
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struct hibmc_drm_private {
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/* hw */
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@ -31,11 +33,50 @@ struct hibmc_drm_private {
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/* drm */
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struct drm_device *dev;
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/* ttm */
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struct drm_global_reference mem_global_ref;
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struct ttm_bo_global_ref bo_global_ref;
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struct ttm_bo_device bdev;
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bool initialized;
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bool mm_inited;
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};
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struct hibmc_bo {
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struct ttm_buffer_object bo;
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struct ttm_placement placement;
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struct ttm_bo_kmap_obj kmap;
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struct drm_gem_object gem;
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struct ttm_place placements[3];
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int pin_count;
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};
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static inline struct hibmc_bo *hibmc_bo(struct ttm_buffer_object *bo)
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{
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return container_of(bo, struct hibmc_bo, bo);
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}
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static inline struct hibmc_bo *gem_to_hibmc_bo(struct drm_gem_object *gem)
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{
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return container_of(gem, struct hibmc_bo, gem);
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}
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void hibmc_set_power_mode(struct hibmc_drm_private *priv,
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unsigned int power_mode);
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void hibmc_set_current_gate(struct hibmc_drm_private *priv,
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unsigned int gate);
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int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
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struct drm_gem_object **obj);
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int hibmc_mm_init(struct hibmc_drm_private *hibmc);
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void hibmc_mm_fini(struct hibmc_drm_private *hibmc);
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int hibmc_bo_pin(struct hibmc_bo *bo, u32 pl_flag, u64 *gpu_addr);
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int hibmc_bo_unpin(struct hibmc_bo *bo);
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void hibmc_gem_free_object(struct drm_gem_object *obj);
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int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
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struct drm_mode_create_dumb *args);
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int hibmc_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
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u32 handle, u64 *offset);
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int hibmc_mmap(struct file *filp, struct vm_area_struct *vma);
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#endif
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485
drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
Normal file
485
drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
Normal file
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@ -0,0 +1,485 @@
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/* Hisilicon Hibmc SoC drm driver
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*
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* Based on the bochs drm driver.
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*
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* Copyright (c) 2016 Huawei Limited.
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*
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* Author:
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* Rongrong Zou <zourongrong@huawei.com>
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* Rongrong Zou <zourongrong@gmail.com>
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* Jianhua Li <lijianhua@huawei.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*/
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#include <ttm/ttm_page_alloc.h>
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#include "hibmc_drm_drv.h"
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#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
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static inline struct hibmc_drm_private *
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hibmc_bdev(struct ttm_bo_device *bd)
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{
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return container_of(bd, struct hibmc_drm_private, bdev);
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}
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static int
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hibmc_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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hibmc_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 hibmc_ttm_global_init(struct hibmc_drm_private *hibmc)
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{
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int ret;
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hibmc->mem_global_ref.global_type = DRM_GLOBAL_TTM_MEM;
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hibmc->mem_global_ref.size = sizeof(struct ttm_mem_global);
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hibmc->mem_global_ref.init = &hibmc_ttm_mem_global_init;
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hibmc->mem_global_ref.release = &hibmc_ttm_mem_global_release;
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ret = drm_global_item_ref(&hibmc->mem_global_ref);
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if (ret) {
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DRM_ERROR("could not get ref on ttm global: %d\n", ret);
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return ret;
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}
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hibmc->bo_global_ref.mem_glob =
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hibmc->mem_global_ref.object;
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hibmc->bo_global_ref.ref.global_type = DRM_GLOBAL_TTM_BO;
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hibmc->bo_global_ref.ref.size = sizeof(struct ttm_bo_global);
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hibmc->bo_global_ref.ref.init = &ttm_bo_global_init;
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hibmc->bo_global_ref.ref.release = &ttm_bo_global_release;
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ret = drm_global_item_ref(&hibmc->bo_global_ref.ref);
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if (ret) {
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DRM_ERROR("failed setting up TTM BO subsystem: %d\n", ret);
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drm_global_item_unref(&hibmc->mem_global_ref);
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return ret;
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}
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return 0;
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}
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static void
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hibmc_ttm_global_release(struct hibmc_drm_private *hibmc)
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{
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drm_global_item_unref(&hibmc->bo_global_ref.ref);
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drm_global_item_unref(&hibmc->mem_global_ref);
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hibmc->mem_global_ref.release = NULL;
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}
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static void hibmc_bo_ttm_destroy(struct ttm_buffer_object *tbo)
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{
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struct hibmc_bo *bo = container_of(tbo, struct hibmc_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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static bool hibmc_ttm_bo_is_hibmc_bo(struct ttm_buffer_object *bo)
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{
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return bo->destroy == &hibmc_bo_ttm_destroy;
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}
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static int
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hibmc_bo_init_mem_type(struct ttm_bo_device *bdev, u32 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", 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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void hibmc_ttm_placement(struct hibmc_bo *bo, int domain)
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{
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u32 count = 0;
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u32 i;
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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[count++].flags = TTM_PL_FLAG_WC |
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TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
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if (domain & TTM_PL_FLAG_SYSTEM)
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bo->placements[count++].flags = TTM_PL_MASK_CACHING |
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TTM_PL_FLAG_SYSTEM;
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if (!count)
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bo->placements[count++].flags = TTM_PL_MASK_CACHING |
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TTM_PL_FLAG_SYSTEM;
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bo->placement.num_placement = count;
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bo->placement.num_busy_placement = count;
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for (i = 0; i < count; i++) {
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bo->placements[i].fpfn = 0;
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bo->placements[i].lpfn = 0;
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}
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}
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static void
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hibmc_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
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{
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struct hibmc_bo *hibmcbo = hibmc_bo(bo);
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if (!hibmc_ttm_bo_is_hibmc_bo(bo))
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return;
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hibmc_ttm_placement(hibmcbo, TTM_PL_FLAG_SYSTEM);
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*pl = hibmcbo->placement;
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}
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static int hibmc_bo_verify_access(struct ttm_buffer_object *bo,
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struct file *filp)
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{
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struct hibmc_bo *hibmcbo = hibmc_bo(bo);
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return drm_vma_node_verify_access(&hibmcbo->gem.vma_node,
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filp->private_data);
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}
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static int hibmc_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 hibmc_drm_private *hibmc = hibmc_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(hibmc->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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}
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return 0;
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}
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static void hibmc_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 hibmc_tt_backend_func = {
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.destroy = &hibmc_ttm_backend_destroy,
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};
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static struct ttm_tt *hibmc_ttm_tt_create(struct ttm_bo_device *bdev,
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unsigned long size,
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u32 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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int ret;
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tt = kzalloc(sizeof(*tt), GFP_KERNEL);
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if (!tt) {
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DRM_ERROR("failed to allocate ttm_tt\n");
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return NULL;
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}
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tt->func = &hibmc_tt_backend_func;
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ret = ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page);
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if (ret) {
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DRM_ERROR("failed to initialize ttm_tt: %d\n", ret);
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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 hibmc_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 hibmc_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 hibmc_bo_driver = {
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.ttm_tt_create = hibmc_ttm_tt_create,
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.ttm_tt_populate = hibmc_ttm_tt_populate,
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.ttm_tt_unpopulate = hibmc_ttm_tt_unpopulate,
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.init_mem_type = hibmc_bo_init_mem_type,
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.evict_flags = hibmc_bo_evict_flags,
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.move = NULL,
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.verify_access = hibmc_bo_verify_access,
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.io_mem_reserve = &hibmc_ttm_io_mem_reserve,
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.io_mem_free = NULL,
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.lru_tail = &ttm_bo_default_lru_tail,
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.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
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};
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int hibmc_mm_init(struct hibmc_drm_private *hibmc)
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{
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int ret;
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struct drm_device *dev = hibmc->dev;
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struct ttm_bo_device *bdev = &hibmc->bdev;
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ret = hibmc_ttm_global_init(hibmc);
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if (ret)
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return ret;
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ret = ttm_bo_device_init(&hibmc->bdev,
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hibmc->bo_global_ref.ref.object,
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&hibmc_bo_driver,
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dev->anon_inode->i_mapping,
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DRM_FILE_PAGE_OFFSET,
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true);
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if (ret) {
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hibmc_ttm_global_release(hibmc);
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DRM_ERROR("error initializing 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,
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hibmc->fb_size >> PAGE_SHIFT);
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if (ret) {
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hibmc_ttm_global_release(hibmc);
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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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hibmc->mm_inited = true;
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return 0;
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}
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void hibmc_mm_fini(struct hibmc_drm_private *hibmc)
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{
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if (!hibmc->mm_inited)
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return;
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ttm_bo_device_release(&hibmc->bdev);
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hibmc_ttm_global_release(hibmc);
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hibmc->mm_inited = false;
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}
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static void hibmc_bo_unref(struct hibmc_bo **bo)
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{
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struct ttm_buffer_object *tbo;
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if ((*bo) == NULL)
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return;
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tbo = &((*bo)->bo);
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ttm_bo_unref(&tbo);
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*bo = NULL;
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}
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int hibmc_bo_create(struct drm_device *dev, int size, int align,
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u32 flags, struct hibmc_bo **phibmcbo)
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{
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struct hibmc_drm_private *hibmc = dev->dev_private;
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struct hibmc_bo *hibmcbo;
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size_t acc_size;
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int ret;
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hibmcbo = kzalloc(sizeof(*hibmcbo), GFP_KERNEL);
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if (!hibmcbo) {
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DRM_ERROR("failed to allocate hibmcbo\n");
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return -ENOMEM;
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}
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ret = drm_gem_object_init(dev, &hibmcbo->gem, size);
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if (ret) {
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DRM_ERROR("failed to initialize drm gem object: %d\n", ret);
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||||
kfree(hibmcbo);
|
||||
return ret;
|
||||
}
|
||||
|
||||
hibmcbo->bo.bdev = &hibmc->bdev;
|
||||
|
||||
hibmc_ttm_placement(hibmcbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
|
||||
|
||||
acc_size = ttm_bo_dma_acc_size(&hibmc->bdev, size,
|
||||
sizeof(struct hibmc_bo));
|
||||
|
||||
ret = ttm_bo_init(&hibmc->bdev, &hibmcbo->bo, size,
|
||||
ttm_bo_type_device, &hibmcbo->placement,
|
||||
align >> PAGE_SHIFT, false, NULL, acc_size,
|
||||
NULL, NULL, hibmc_bo_ttm_destroy);
|
||||
if (ret) {
|
||||
hibmc_bo_unref(&hibmcbo);
|
||||
DRM_ERROR("failed to initialize ttm_bo: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
*phibmcbo = hibmcbo;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int hibmc_bo_pin(struct hibmc_bo *bo, u32 pl_flag, u64 *gpu_addr)
|
||||
{
|
||||
int i, ret;
|
||||
|
||||
if (bo->pin_count) {
|
||||
bo->pin_count++;
|
||||
if (gpu_addr)
|
||||
*gpu_addr = bo->bo.offset;
|
||||
return 0;
|
||||
}
|
||||
|
||||
hibmc_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 = bo->bo.offset;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int hibmc_bo_unpin(struct hibmc_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].flags &= ~TTM_PL_FLAG_NO_EVICT;
|
||||
ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
|
||||
if (ret) {
|
||||
DRM_ERROR("validate failed for unpin: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int hibmc_mmap(struct file *filp, struct vm_area_struct *vma)
|
||||
{
|
||||
struct drm_file *file_priv;
|
||||
struct hibmc_drm_private *hibmc;
|
||||
|
||||
if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
|
||||
return -EINVAL;
|
||||
|
||||
file_priv = filp->private_data;
|
||||
hibmc = file_priv->minor->dev->dev_private;
|
||||
return ttm_bo_mmap(filp, vma, &hibmc->bdev);
|
||||
}
|
||||
|
||||
int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
|
||||
struct drm_gem_object **obj)
|
||||
{
|
||||
struct hibmc_bo *hibmcbo;
|
||||
int ret;
|
||||
|
||||
*obj = NULL;
|
||||
|
||||
size = PAGE_ALIGN(size);
|
||||
if (size == 0) {
|
||||
DRM_ERROR("error: zero size\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = hibmc_bo_create(dev, size, 0, 0, &hibmcbo);
|
||||
if (ret) {
|
||||
if (ret != -ERESTARTSYS)
|
||||
DRM_ERROR("failed to allocate GEM object: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
*obj = &hibmcbo->gem;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
|
||||
struct drm_mode_create_dumb *args)
|
||||
{
|
||||
struct drm_gem_object *gobj;
|
||||
u32 handle;
|
||||
int ret;
|
||||
|
||||
args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 16);
|
||||
args->size = args->pitch * args->height;
|
||||
|
||||
ret = hibmc_gem_create(dev, args->size, false,
|
||||
&gobj);
|
||||
if (ret) {
|
||||
DRM_ERROR("failed to create GEM object: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = drm_gem_handle_create(file, gobj, &handle);
|
||||
drm_gem_object_unreference_unlocked(gobj);
|
||||
if (ret) {
|
||||
DRM_ERROR("failed to unreference GEM object: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
args->handle = handle;
|
||||
return 0;
|
||||
}
|
||||
|
||||
void hibmc_gem_free_object(struct drm_gem_object *obj)
|
||||
{
|
||||
struct hibmc_bo *hibmcbo = gem_to_hibmc_bo(obj);
|
||||
|
||||
hibmc_bo_unref(&hibmcbo);
|
||||
}
|
||||
|
||||
static u64 hibmc_bo_mmap_offset(struct hibmc_bo *bo)
|
||||
{
|
||||
return drm_vma_node_offset_addr(&bo->bo.vma_node);
|
||||
}
|
||||
|
||||
int hibmc_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
|
||||
u32 handle, u64 *offset)
|
||||
{
|
||||
struct drm_gem_object *obj;
|
||||
struct hibmc_bo *bo;
|
||||
|
||||
obj = drm_gem_object_lookup(file, handle);
|
||||
if (!obj)
|
||||
return -ENOENT;
|
||||
|
||||
bo = gem_to_hibmc_bo(obj);
|
||||
*offset = hibmc_bo_mmap_offset(bo);
|
||||
|
||||
drm_gem_object_unreference_unlocked(obj);
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in a new issue