Commit e4daebc7 authored by Rongrong Zou's avatar Rongrong Zou

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: default avatarRongrong Zou <zourongrong@gmail.com>
Reviewed-by: default avatarSean Paul <seanpaul@chromium.org>
Reviewed-by: default avatarXinliang Liu <xinliang.liu@linaro.org>
Acked-by: default avatarSean Paul <seanpaul@chromium.org>
parent 5e0df3a0
ccflags-y := -Iinclude/drm
hibmc-drm-y := hibmc_drm_drv.o
hibmc-drm-y := hibmc_drm_drv.o hibmc_ttm.o
obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc-drm.o
......@@ -28,6 +28,7 @@ static const struct file_operations hibmc_fops = {
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
.compat_ioctl = drm_compat_ioctl,
.mmap = hibmc_mmap,
.poll = drm_poll,
.read = drm_read,
.llseek = no_llseek,
......@@ -43,6 +44,7 @@ static void hibmc_disable_vblank(struct drm_device *dev, unsigned int pipe)
}
static struct drm_driver hibmc_driver = {
.driver_features = DRIVER_GEM,
.fops = &hibmc_fops,
.name = "hibmc",
.date = "20160828",
......@@ -52,6 +54,10 @@ static struct drm_driver hibmc_driver = {
.get_vblank_counter = drm_vblank_no_hw_counter,
.enable_vblank = hibmc_enable_vblank,
.disable_vblank = hibmc_disable_vblank,
.gem_free_object_unlocked = hibmc_gem_free_object,
.dumb_create = hibmc_dumb_create,
.dumb_map_offset = hibmc_dumb_mmap_offset,
.dumb_destroy = drm_gem_dumb_destroy,
};
static int hibmc_pm_suspend(struct device *dev)
......@@ -194,6 +200,10 @@ static int hibmc_hw_init(struct hibmc_drm_private *priv)
static int hibmc_unload(struct drm_device *dev)
{
struct hibmc_drm_private *priv = dev->dev_private;
hibmc_mm_fini(priv);
dev->dev_private = NULL;
return 0;
}
......@@ -214,6 +224,10 @@ static int hibmc_load(struct drm_device *dev)
if (ret)
goto err;
ret = hibmc_mm_init(priv);
if (ret)
goto err;
return 0;
err:
......
......@@ -20,6 +20,8 @@
#define HIBMC_DRM_DRV_H
#include <drm/drmP.h>
#include <drm/drm_gem.h>
#include <drm/ttm/ttm_bo_driver.h>
struct hibmc_drm_private {
/* hw */
......@@ -31,11 +33,50 @@ struct hibmc_drm_private {
/* drm */
struct drm_device *dev;
/* ttm */
struct drm_global_reference mem_global_ref;
struct ttm_bo_global_ref bo_global_ref;
struct ttm_bo_device bdev;
bool initialized;
bool mm_inited;
};
struct hibmc_bo {
struct ttm_buffer_object bo;
struct ttm_placement placement;
struct ttm_bo_kmap_obj kmap;
struct drm_gem_object gem;
struct ttm_place placements[3];
int pin_count;
};
static inline struct hibmc_bo *hibmc_bo(struct ttm_buffer_object *bo)
{
return container_of(bo, struct hibmc_bo, bo);
}
static inline struct hibmc_bo *gem_to_hibmc_bo(struct drm_gem_object *gem)
{
return container_of(gem, struct hibmc_bo, gem);
}
void hibmc_set_power_mode(struct hibmc_drm_private *priv,
unsigned int power_mode);
void hibmc_set_current_gate(struct hibmc_drm_private *priv,
unsigned int gate);
int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
struct drm_gem_object **obj);
int hibmc_mm_init(struct hibmc_drm_private *hibmc);
void hibmc_mm_fini(struct hibmc_drm_private *hibmc);
int hibmc_bo_pin(struct hibmc_bo *bo, u32 pl_flag, u64 *gpu_addr);
int hibmc_bo_unpin(struct hibmc_bo *bo);
void hibmc_gem_free_object(struct drm_gem_object *obj);
int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
struct drm_mode_create_dumb *args);
int hibmc_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
u32 handle, u64 *offset);
int hibmc_mmap(struct file *filp, struct vm_area_struct *vma);
#endif
/* Hisilicon Hibmc SoC drm driver
*
* Based on the bochs drm driver.
*
* Copyright (c) 2016 Huawei Limited.
*
* Author:
* Rongrong Zou <zourongrong@huawei.com>
* Rongrong Zou <zourongrong@gmail.com>
* Jianhua Li <lijianhua@huawei.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <ttm/ttm_page_alloc.h>
#include "hibmc_drm_drv.h"
#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
static inline struct hibmc_drm_private *
hibmc_bdev(struct ttm_bo_device *bd)
{
return container_of(bd, struct hibmc_drm_private, bdev);
}
static int
hibmc_ttm_mem_global_init(struct drm_global_reference *ref)
{
return ttm_mem_global_init(ref->object);
}
static void
hibmc_ttm_mem_global_release(struct drm_global_reference *ref)
{
ttm_mem_global_release(ref->object);
}
static int hibmc_ttm_global_init(struct hibmc_drm_private *hibmc)
{
int ret;
hibmc->mem_global_ref.global_type = DRM_GLOBAL_TTM_MEM;
hibmc->mem_global_ref.size = sizeof(struct ttm_mem_global);
hibmc->mem_global_ref.init = &hibmc_ttm_mem_global_init;
hibmc->mem_global_ref.release = &hibmc_ttm_mem_global_release;
ret = drm_global_item_ref(&hibmc->mem_global_ref);
if (ret) {
DRM_ERROR("could not get ref on ttm global: %d\n", ret);
return ret;
}
hibmc->bo_global_ref.mem_glob =
hibmc->mem_global_ref.object;
hibmc->bo_global_ref.ref.global_type = DRM_GLOBAL_TTM_BO;
hibmc->bo_global_ref.ref.size = sizeof(struct ttm_bo_global);
hibmc->bo_global_ref.ref.init = &ttm_bo_global_init;
hibmc->bo_global_ref.ref.release = &ttm_bo_global_release;
ret = drm_global_item_ref(&hibmc->bo_global_ref.ref);
if (ret) {
DRM_ERROR("failed setting up TTM BO subsystem: %d\n", ret);
drm_global_item_unref(&hibmc->mem_global_ref);
return ret;
}
return 0;
}
static void
hibmc_ttm_global_release(struct hibmc_drm_private *hibmc)
{
drm_global_item_unref(&hibmc->bo_global_ref.ref);
drm_global_item_unref(&hibmc->mem_global_ref);
hibmc->mem_global_ref.release = NULL;
}
static void hibmc_bo_ttm_destroy(struct ttm_buffer_object *tbo)
{
struct hibmc_bo *bo = container_of(tbo, struct hibmc_bo, bo);
drm_gem_object_release(&bo->gem);
kfree(bo);
}
static bool hibmc_ttm_bo_is_hibmc_bo(struct ttm_buffer_object *bo)
{
return bo->destroy == &hibmc_bo_ttm_destroy;
}
static int
hibmc_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type,
struct ttm_mem_type_manager *man)
{
switch (type) {
case TTM_PL_SYSTEM:
man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
man->available_caching = TTM_PL_MASK_CACHING;
man->default_caching = TTM_PL_FLAG_CACHED;
break;
case TTM_PL_VRAM:
man->func = &ttm_bo_manager_func;
man->flags = TTM_MEMTYPE_FLAG_FIXED |
TTM_MEMTYPE_FLAG_MAPPABLE;
man->available_caching = TTM_PL_FLAG_UNCACHED |
TTM_PL_FLAG_WC;
man->default_caching = TTM_PL_FLAG_WC;
break;
default:
DRM_ERROR("unsupported memory type %u\n", type);
return -EINVAL;
}
return 0;
}
void hibmc_ttm_placement(struct hibmc_bo *bo, int domain)
{
u32 count = 0;
u32 i;
bo->placement.placement = bo->placements;
bo->placement.busy_placement = bo->placements;
if (domain & TTM_PL_FLAG_VRAM)
bo->placements[count++].flags = TTM_PL_FLAG_WC |
TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
if (domain & TTM_PL_FLAG_SYSTEM)
bo->placements[count++].flags = TTM_PL_MASK_CACHING |
TTM_PL_FLAG_SYSTEM;
if (!count)
bo->placements[count++].flags = TTM_PL_MASK_CACHING |
TTM_PL_FLAG_SYSTEM;
bo->placement.num_placement = count;
bo->placement.num_busy_placement = count;
for (i = 0; i < count; i++) {
bo->placements[i].fpfn = 0;
bo->placements[i].lpfn = 0;
}
}
static void
hibmc_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
{
struct hibmc_bo *hibmcbo = hibmc_bo(bo);
if (!hibmc_ttm_bo_is_hibmc_bo(bo))
return;
hibmc_ttm_placement(hibmcbo, TTM_PL_FLAG_SYSTEM);
*pl = hibmcbo->placement;
}
static int hibmc_bo_verify_access(struct ttm_buffer_object *bo,
struct file *filp)
{
struct hibmc_bo *hibmcbo = hibmc_bo(bo);
return drm_vma_node_verify_access(&hibmcbo->gem.vma_node,
filp->private_data);
}
static int hibmc_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 hibmc_drm_private *hibmc = hibmc_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(hibmc->dev->pdev, 0);
mem->bus.is_iomem = true;
break;
default:
return -EINVAL;
}
return 0;
}
static void hibmc_ttm_backend_destroy(struct ttm_tt *tt)
{
ttm_tt_fini(tt);
kfree(tt);
}
static struct ttm_backend_func hibmc_tt_backend_func = {
.destroy = &hibmc_ttm_backend_destroy,
};
static struct ttm_tt *hibmc_ttm_tt_create(struct ttm_bo_device *bdev,
unsigned long size,
u32 page_flags,
struct page *dummy_read_page)
{
struct ttm_tt *tt;
int ret;
tt = kzalloc(sizeof(*tt), GFP_KERNEL);
if (!tt) {
DRM_ERROR("failed to allocate ttm_tt\n");
return NULL;
}
tt->func = &hibmc_tt_backend_func;
ret = ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page);
if (ret) {
DRM_ERROR("failed to initialize ttm_tt: %d\n", ret);
kfree(tt);
return NULL;
}
return tt;
}
static int hibmc_ttm_tt_populate(struct ttm_tt *ttm)
{
return ttm_pool_populate(ttm);
}
static void hibmc_ttm_tt_unpopulate(struct ttm_tt *ttm)
{
ttm_pool_unpopulate(ttm);
}
struct ttm_bo_driver hibmc_bo_driver = {
.ttm_tt_create = hibmc_ttm_tt_create,
.ttm_tt_populate = hibmc_ttm_tt_populate,
.ttm_tt_unpopulate = hibmc_ttm_tt_unpopulate,
.init_mem_type = hibmc_bo_init_mem_type,
.evict_flags = hibmc_bo_evict_flags,
.move = NULL,
.verify_access = hibmc_bo_verify_access,
.io_mem_reserve = &hibmc_ttm_io_mem_reserve,
.io_mem_free = NULL,
.lru_tail = &ttm_bo_default_lru_tail,
.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
};
int hibmc_mm_init(struct hibmc_drm_private *hibmc)
{
int ret;
struct drm_device *dev = hibmc->dev;
struct ttm_bo_device *bdev = &hibmc->bdev;
ret = hibmc_ttm_global_init(hibmc);
if (ret)
return ret;
ret = ttm_bo_device_init(&hibmc->bdev,
hibmc->bo_global_ref.ref.object,
&hibmc_bo_driver,
dev->anon_inode->i_mapping,
DRM_FILE_PAGE_OFFSET,
true);
if (ret) {
hibmc_ttm_global_release(hibmc);
DRM_ERROR("error initializing bo driver: %d\n", ret);
return ret;
}
ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
hibmc->fb_size >> PAGE_SHIFT);
if (ret) {
hibmc_ttm_global_release(hibmc);
DRM_ERROR("failed ttm VRAM init: %d\n", ret);
return ret;
}
hibmc->mm_inited = true;
return 0;
}
void hibmc_mm_fini(struct hibmc_drm_private *hibmc)
{
if (!hibmc->mm_inited)
return;
ttm_bo_device_release(&hibmc->bdev);
hibmc_ttm_global_release(hibmc);
hibmc->mm_inited = false;
}
static void hibmc_bo_unref(struct hibmc_bo **bo)
{
struct ttm_buffer_object *tbo;
if ((*bo) == NULL)
return;
tbo = &((*bo)->bo);
ttm_bo_unref(&tbo);
*bo = NULL;
}
int hibmc_bo_create(struct drm_device *dev, int size, int align,
u32 flags, struct hibmc_bo **phibmcbo)
{
struct hibmc_drm_private *hibmc = dev->dev_private;
struct hibmc_bo *hibmcbo;
size_t acc_size;
int ret;
hibmcbo = kzalloc(sizeof(*hibmcbo), GFP_KERNEL);
if (!hibmcbo) {
DRM_ERROR("failed to allocate hibmcbo\n");
return -ENOMEM;
}
ret = drm_gem_object_init(dev, &hibmcbo->gem, size);
if (ret) {
DRM_ERROR("failed to initialize drm gem object: %d\n", ret);
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;
}
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