å¨ 2016/11/11 21:25, Sean Paul åé:
> On Fri, Nov 11, 2016 at 6:16 AM, Rongrong Zou <zourongrong at huawei.com>
> wrote:
>> å¨ 2016/11/11 1:35, Sean Paul åé:
>>>
>>> On Fri, Oct 28, 2016 at 3:27 AM, Rongrong Zou <zourongrong at gmail.com>
>>> wrote:
>>>>
>>>> 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 at gmail.com>
>>>> ---
>>>> drivers/gpu/drm/hisilicon/hibmc/Kconfig | 1 +
>>>> drivers/gpu/drm/hisilicon/hibmc/Makefile | 2 +-
>>>> drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 12 +
>>>> drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h | 46 +++
>>>> drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c | 490
>>>> ++++++++++++++++++++++++
>>>> 5 files changed, 550 insertions(+), 1 deletion(-)
>>>> create mode 100644 drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
>>>>
>>>> diff --git a/drivers/gpu/drm/hisilicon/hibmc/Kconfig
>>>> b/drivers/gpu/drm/hisilicon/hibmc/Kconfig
>>>> index a9af90d..bcb8c18 100644
>>>> --- a/drivers/gpu/drm/hisilicon/hibmc/Kconfig
>>>> +++ b/drivers/gpu/drm/hisilicon/hibmc/Kconfig
>>>> @@ -1,6 +1,7 @@
>>>> config DRM_HISI_HIBMC
>>>> tristate "DRM Support for Hisilicon Hibmc"
>>>> depends on DRM && PCI
>>>> + select DRM_TTM
>>>>
>>>> help
>>>> Choose this option if you have a Hisilicon Hibmc soc chipset.
>>>> diff --git a/drivers/gpu/drm/hisilicon/hibmc/Makefile
>>>> b/drivers/gpu/drm/hisilicon/hibmc/Makefile
>>>> index 97cf4a0..d5c40b8 100644
>>>> --- a/drivers/gpu/drm/hisilicon/hibmc/Makefile
>>>> +++ b/drivers/gpu/drm/hisilicon/hibmc/Makefile
>>>> @@ -1,5 +1,5 @@
>>>> ccflags-y := -Iinclude/drm
>>>> -hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_power.o
>>>> +hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_power.o hibmc_ttm.o
>>>>
>>>> obj-$(CONFIG_DRM_HISI_HIBMC) +=hibmc-drm.o
>>>> #obj-y += hibmc-drm.o
>>>> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
>>>> b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
>>>> index 4669d42..81f4301 100644
>>>> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
>>>> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
>>>> @@ -31,6 +31,7 @@
>>>> #ifdef CONFIG_COMPAT
>>>> .compat_ioctl = drm_compat_ioctl,
>>>> #endif
>>>> + .mmap = hibmc_mmap,
>>>> .poll = drm_poll,
>>>> .read = drm_read,
>>>> .llseek = no_llseek,
>>>> @@ -46,6 +47,8 @@ static void hibmc_disable_vblank(struct drm_device
>>>> *dev, unsigned int pipe)
>>>> }
>>>>
>>>> static struct drm_driver hibmc_driver = {
>>>> + .driver_features = DRIVER_GEM,
>>>> +
>>>
>>>
>>> nit: extra space
>>>
>>>> .fops = &hibmc_fops,
>>>> .name = "hibmc",
>>>> .date = "20160828",
>>>> @@ -55,6 +58,10 @@ static void hibmc_disable_vblank(struct drm_device
>>>> *dev, unsigned int pipe)
>>>> .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)
>>>> @@ -163,6 +170,7 @@ static int hibmc_unload(struct drm_device *dev)
>>>> {
>>>> struct hibmc_drm_device *hidev = dev->dev_private;
>>>>
>>>> + hibmc_mm_fini(hidev);
>>>> hibmc_hw_fini(hidev);
>>>> dev->dev_private = NULL;
>>>> return 0;
>>>> @@ -183,6 +191,10 @@ static int hibmc_load(struct drm_device *dev,
>>>> unsigned long flags)
>>>> if (ret)
>>>> goto err;
>>>>
>>>> + ret = hibmc_mm_init(hidev);
>>>> + if (ret)
>>>> + goto err;
>>>> +
>>>> return 0;
>>>>
>>>> err:
>>>> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
>>>> b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
>>>> index 0037341..db8d80e 100644
>>>> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
>>>> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
>>>> @@ -20,6 +20,8 @@
>>>> #define HIBMC_DRM_DRV_H
>>>>
>>>> #include <drm/drmP.h>
>>>> +#include <drm/ttm/ttm_bo_driver.h>
>>>> +#include <drm/drm_gem.h>
>>>
>>>
>>> nit: alphabetize
>>
>>
>> will fix it, thanks.
>>
>>>
>>>>
>>>> struct hibmc_drm_device {
>>>> /* hw */
>>>> @@ -30,6 +32,50 @@ struct hibmc_drm_device {
>>>>
>>>> /* drm */
>>>> struct drm_device *dev;
>>>> +
>>>> + /* ttm */
>>>> + struct {
>>>> + struct drm_global_reference mem_global_ref;
>>>> + struct ttm_bo_global_ref bo_global_ref;
>>>> + struct ttm_bo_device bdev;
>>>> + bool initialized;
>>>> + } ttm;
>>>
>>>
>>> I don't think you gain anything other than keystrokes from the substruct
>>
>>
>> I'm sorry i didn't catch you, i looked at the all drivers used ttm such
>> as ast/bochs/cirrus/mgag200/qxl/virtio_gpu, they all embedded the ttm
>> substruct
>> into the driver-private struct.
>>
>> so do you mean
>> struct hibmc_drm_device {
>> /* hw */
>> void __iomem *mmio;
>> void __iomem *fb_map;
>> unsigned long fb_base;
>> unsigned long fb_size;
>>
>> /* drm */
>> struct drm_device *dev;
>> struct drm_plane plane;
>> struct drm_crtc crtc;
>> struct drm_encoder encoder;
>> struct drm_connector connector;
>> bool mode_config_initialized;
>>
>> /* ttm */
>> struct drm_global_reference mem_global_ref;
>> struct ttm_bo_global_ref bo_global_ref;
>> struct ttm_bo_device bdev;
>> bool initialized;
>> ...
>> };
>> ?
>
> Yeah, that's what I was thinking
>
>>
>>>
>>>> +
>>>> + 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);
>>>> +}
>>>> +
>>>> +#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
>>>
>>>
>>> Hide this in ttm.c
>>
>>
>> ok, will do that.
>> thanks for pointing it out.
>>
>>
>>>
>>>> +
>>>> +int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
>>>> + struct drm_gem_object **obj);
>>>> +
>>>> +int hibmc_mm_init(struct hibmc_drm_device *hibmc);
>>>> +void hibmc_mm_fini(struct hibmc_drm_device *hibmc);
>>>> +int hibmc_bo_pin(struct hibmc_bo *bo, u32 pl_flag, u64 *gpu_addr);
>>>> +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
>>>> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
>>>> b/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
>>>> new file mode 100644
>>>> index 0000000..0802ebd
>>>> --- /dev/null
>>>> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
>>>> @@ -0,0 +1,490 @@
>>>> +/* Hisilicon Hibmc SoC drm driver
>>>> + *
>>>> + * Based on the bochs drm driver.
>>>> + *
>>>> + * Copyright (c) 2016 Huawei Limited.
>>>> + *
>>>> + * Author:
>>>> + * Rongrong Zou <zourongrong at huawei.com>
>>>> + * Rongrong Zou <zourongrong at gmail.com>
>>>> + * Jianhua Li <lijianhua at 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 "hibmc_drm_drv.h"
>>>> +#include <ttm/ttm_page_alloc.h>
>>>> +#include <drm/drm_crtc_helper.h>
>>>> +#include <drm/drm_atomic_helper.h>
>>>> +
>>>> +static inline struct hibmc_drm_device *
>>>> +hibmc_bdev(struct ttm_bo_device *bd)
>>>> +{
>>>> + return container_of(bd, struct hibmc_drm_device, ttm.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_device *hibmc)
>>>> +{
>>>> + struct drm_global_reference *global_ref;
>>>> + int r;
>>>
>>>
>>> nit: try not to use one character variable names unless it's for the
>>> purpose of a loop (ie: i,j). You also use ret elsewhere in the driver,
>>> so it'd be nice to remain consistent
>>
>>
>> the whole file is delivered from bochs ttm, i didn't modify anything except
>> some checkpatch warnings and the 'hibmc_' prefix. Unfortunately, some
>> problems were delivered too.
>
> Yeah, seems like it. Perhaps you can post patches to fix these issues
> in the other drivers too :)
i will do after the this one get merged :)
>
>>
>>>
>>>> +
>>>> + global_ref = &hibmc->ttm.mem_global_ref;
>>>
>>>
>>> I think using the global_ref local obfuscates what you're doing here.
>>> It saves you 6 characters while typing, but adds a layer of
>>> indirection for all future readers.
>>>
>>>> + global_ref->global_type = DRM_GLOBAL_TTM_MEM;
>>>> + global_ref->size = sizeof(struct ttm_mem_global);
>>>> + global_ref->init = &hibmc_ttm_mem_global_init;
>>>> + global_ref->release = &hibmc_ttm_mem_global_release;
>>>> + r = drm_global_item_ref(global_ref);
>>>> + if (r != 0) {
>>>
>>>
>>> nit: if (r)
>>
>>
>> will fix it,
>> thanks.
>> BTW, i wonder why checkpatch.pl didn't report it.
>>
>>
>>>
>>>> + DRM_ERROR("Failed setting up TTM memory accounting
>>>> subsystem.\n"
>>>> + );
>>>
>>>
>>> Breaking up the line for one character is probably not worthwhile, and
>>> you should really print the error. How about:
>>>
>>> DRM_ERROR("Could not get ref on ttm global ret=%d.\n", ret);
>>
>>
>> i like your solution, thanks.
>>
>>
>>>
>>>
>>>> + return r;
>>>> + }
>>>> +
>>>> + hibmc->ttm.bo_global_ref.mem_glob =
>>>> + hibmc->ttm.mem_global_ref.object;
>>>> + global_ref = &hibmc->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(&hibmc->ttm.mem_global_ref);
>>>> + return r;
>>>> + }
>>>> + return 0;
>>>> +}
>>>> +
>>>> +static void
>>>> +hibmc_ttm_global_release(struct hibmc_drm_device *hibmc)
>>>> +{
>>>> + if (!hibmc->ttm.mem_global_ref.release)
>>>
>>>
>>> Are you actually hitting this condition? This seems like it's papering
>>> over something else.
>>
>>
>> it was also delivered from others, i looked at the xxx_ttm_global_init
>> function, 'mem_global_ref.release' is assigned unconditionally, so i
>> think this condition never be hit, it may be hit when release twice,
>> but this won't take place in my driver.
>>
>
> Yeah, that's what I was hoping for. So perhaps we can remove this?
yes, we can.
Regards,
Rongrong.
>
>>>
>>>> + return;
>>>> +
>>>> + drm_global_item_unref(&hibmc->ttm.bo_global_ref.ref);
>>>> + drm_global_item_unref(&hibmc->ttm.mem_global_ref);
>>>> + hibmc->ttm.mem_global_ref.release = NULL;
>>>> +}
>>>> +
>>>> +static void hibmc_bo_ttm_destroy(struct ttm_buffer_object *tbo)
>>>> +{
>>>> + struct hibmc_bo *bo;
>>>> +
>>>> + bo = container_of(tbo, struct hibmc_bo, bo);
>>>
>>>
>>> nit: No need to split this into a separate line.
>>
>>
>> agreed, thanks.
>>
>>>
>>>> +
>>>> + drm_gem_object_release(&bo->gem);
>>>> + kfree(bo);
>>>> +}
>>>> +
>>>> +static bool hibmc_ttm_bo_is_hibmc_bo(struct ttm_buffer_object *bo)
>>>> +{
>>>> + if (bo->destroy == &hibmc_bo_ttm_destroy)
>>>> + return true;
>>>> + return false;
>>>
>>>
>>> return bo->destroy == &hibmc_bo_ttm_destroy;
>>
>>
>> looks better to me.
>>
>>
>>>
>>>> +}
>>>> +
>>>> +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 c = 0;
>>>
>>>
>>> Can you please use a more descriptive name than 'c'?
>>
>>
>> ok, will do that.
>>
>>>
>>>> + u32 i;
>>>> +
>>>> + bo->placement.placement = bo->placements;
>>>> + bo->placement.busy_placement = bo->placements;
>>>> + if (domain & TTM_PL_FLAG_VRAM)
>>>> + bo->placements[c++].flags = TTM_PL_FLAG_WC |
>>>> + TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
>>>
>>>
>>> nit: you're alignment is off here and below
>>
>>
>> is it correct?
>>
>> if (domain & TTM_PL_FLAG_VRAM)
>> bo->placements[c++].flags = TTM_PL_FLAG_WC |
>> TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
>> if (domain & TTM_PL_FLAG_SYSTEM)
>> bo->placements[c++].flags = TTM_PL_MASK_CACHING |
>> TTM_PL_FLAG_SYSTEM;
>> if (!c)
>> bo->placements[c++].flags = TTM_PL_MASK_CACHING |
>> TTM_PL_FLAG_SYSTEM;
>>
>
> Pretty much anything other than lining them up one under the other is better
>
>>>
>>>> + if (domain & TTM_PL_FLAG_SYSTEM)
>>>> + bo->placements[c++].flags = TTM_PL_MASK_CACHING |
>>>> + TTM_PL_FLAG_SYSTEM;
>>>> + if (!c)
>>>> + bo->placements[c++].flags = TTM_PL_MASK_CACHING |
>>>> + TTM_PL_FLAG_SYSTEM;
>>>> +
>>>> + bo->placement.num_placement = c;
>>>> + bo->placement.num_busy_placement = c;
>>>> + for (i = 0; i < c; ++i) {
>>>
>>>
>>> nit: we tend towards post-increment in kernel
>>
>>
>> agreed, thanks.
>>
>>
>>>
>>>> + 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_device *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_io_mem_free(struct ttm_bo_device *bdev,
>>>> + struct ttm_mem_reg *mem)
>>>> +{
>>>> +}
>>>
>>>
>>> No need to stub this, the caller does a NULL-check before invoking
>>
>>
>> will delete it, thanks.
>>
>>>
>>>> +
>>>> +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;
>>>> +
>>>> + tt = kzalloc(sizeof(*tt), GFP_KERNEL);
>>>> + if (!tt)
>>>
>>>
>>> Print error
>>
>>
>> ok, will do that, thanks.
>>
>>>
>>>> + return NULL;
>>>> + tt->func = &hibmc_tt_backend_func;
>>>> + if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
>>>
>>>
>>> Here too?
>>
>>
>> ditto
>>
>>
>>>
>>>> + 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 = &hibmc_ttm_io_mem_free,
>>>> + .lru_tail = &ttm_bo_default_lru_tail,
>>>> + .swap_lru_tail = &ttm_bo_default_swap_lru_tail,
>>>> +};
>>>> +
>>>> +int hibmc_mm_init(struct hibmc_drm_device *hibmc)
>>>> +{
>>>> + int ret;
>>>> + struct drm_device *dev = hibmc->dev;
>>>> + struct ttm_bo_device *bdev = &hibmc->ttm.bdev;
>>>> +
>>>> + ret = hibmc_ttm_global_init(hibmc);
>>>> + if (ret)
>>>> + return ret;
>>>> +
>>>> + ret = ttm_bo_device_init(&hibmc->ttm.bdev,
>>>> + hibmc->ttm.bo_global_ref.ref.object,
>>>> + &hibmc_bo_driver,
>>>> + dev->anon_inode->i_mapping,
>>>> + DRM_FILE_PAGE_OFFSET,
>>>> + true);
>>>> + if (ret) {
>>>
>>>
>>> Call hibmc_ttm_global_release here?
>>
>>
>> agreed, thanks for pointing it out.
>>
>>>
>>>> + DRM_ERROR("Error initialising bo driver; %d\n", ret);
>>>> + return ret;
>>>> + }
>>>> +
>>>> + ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
>>>> + hibmc->fb_size >> PAGE_SHIFT);
>>>> + if (ret) {
>>>
>>>
>>> Clean up here as well?
>>
>>
>> ditto
>>
>>
>>>
>>>> + DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
>>>> + return ret;
>>>> + }
>>>> +
>>>> + hibmc->mm_inited = true;
>>>> + return 0;
>>>> +}
>>>> +
>>>> +void hibmc_mm_fini(struct hibmc_drm_device *hibmc)
>>>> +{
>>>> + if (!hibmc->mm_inited)
>>>> + return;
>>>> +
>>>> + ttm_bo_device_release(&hibmc->ttm.bdev);
>>>> + hibmc_ttm_global_release(hibmc);
>>>> + hibmc->mm_inited = false;
>>>> +}
>>>> +
>>>> +int hibmc_bo_create(struct drm_device *dev, int size, int align,
>>>> + u32 flags, struct hibmc_bo **phibmcbo)
>>>> +{
>>>> + struct hibmc_drm_device *hibmc = dev->dev_private;
>>>> + struct hibmc_bo *hibmcbo;
>>>> + size_t acc_size;
>>>> + int ret;
>>>> +
>>>> + hibmcbo = kzalloc(sizeof(*hibmcbo), GFP_KERNEL);
>>>> + if (!hibmcbo)
>>>> + return -ENOMEM;
>>>> +
>>>> + ret = drm_gem_object_init(dev, &hibmcbo->gem, size);
>>>> + if (ret) {
>>>> + kfree(hibmcbo);
>>>> + return ret;
>>>> + }
>>>> +
>>>> + hibmcbo->bo.bdev = &hibmc->ttm.bdev;
>>>> +
>>>> + hibmc_ttm_placement(hibmcbo, TTM_PL_FLAG_VRAM |
>>>> TTM_PL_FLAG_SYSTEM);
>>>> +
>>>> + acc_size = ttm_bo_dma_acc_size(&hibmc->ttm.bdev, size,
>>>> + sizeof(struct hibmc_bo));
>>>> +
>>>> + ret = ttm_bo_init(&hibmc->ttm.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)
>>>
>>>
>>> Missing hibmcbo clean up here
>>
>>
>> i looked at all other ttm drivers and all of them return directly when
>> ttm_bo_init
>> failed, however, i think it is better to clean up here, should i call
>> hibmc_bo_unref(&hibmc_bo) here ?
>>
>
> Yeah, that should work (might want to test it, though ;)
>
>
>>>
>>>> + return ret;
>>>> +
>>>> + *phibmcbo = hibmcbo;
>>>> + return 0;
>>>> +}
>>>> +
>>>> +static inline u64 hibmc_bo_gpu_offset(struct hibmc_bo *bo)
>>>> +{
>>>> + return bo->bo.offset;
>>>> +}
>>>
>>>
>>> I don't think this function provides any value
>>
>>
>> do you nean i use bo->bo.offset instead of calling hibmc_bo_gpu_offset()?
>>
>
> yes
>
>>>
>>>> +
>>>> +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 = hibmc_bo_gpu_offset(bo);
>>>
>>>
>>> Are you missing a return here?
>>
>>
>> Thanks for pointing it out!
>>
>>
>>>
>>>> + }
>>>> +
>>>> + 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 = hibmc_bo_gpu_offset(bo);
>>>> + return 0;
>>>> +}
>>>> +
>>>> +int hibmc_bo_push_sysram(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;
>>>> +
>>>> + if (bo->kmap.virtual)
>>>
>>>
>>> ttm_bo_kunmap already does this check so you don't have to
>>
>>
>> agreed. will remove this condition.
>>
>>>
>>>> + ttm_bo_kunmap(&bo->kmap);
>>>> +
>>>> + hibmc_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
>>>> + for (i = 0; i < bo->placement.num_placement ; i++)
>>>> + bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
>>>> +
>>>> + ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
>>>> + if (ret) {
>>>> + DRM_ERROR("pushing to VRAM failed\n");
>>>
>>>
>>> Print ret
>>
>>
>> ok, thanks.
>>
>>
>>>
>>>> + return ret;
>>>> + }
>>>> + return 0;
>>>> +}
>>>> +
>>>> +int hibmc_mmap(struct file *filp, struct vm_area_struct *vma)
>>>> +{
>>>> + struct drm_file *file_priv;
>>>> + struct hibmc_drm_device *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->ttm.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)
>>>
>>>
>>> Print error
>>
>>
>> ditto
>>
>>>
>>>> + return -EINVAL;
>>>> +
>>>> + ret = hibmc_bo_create(dev, size, 0, 0, &hibmcbo);
>>>> + if (ret) {
>>>> + if (ret != -ERESTARTSYS)
>>>> + DRM_ERROR("failed to allocate GEM object\n");
>>>
>>>
>>> Print ret
>>
>>
>> ditto
>>
>>>
>>>> + 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 * ((args->bpp + 7) / 8), 16);
>>>
>>>
>>> What's up with the bpp + 7 here? Perhaps you're looking for DIV_ROUND_UP?
>>
>>
>> Yes, that sounds sane.
>>
>
> sane is what i usually aim for :)
>
> Sean
>
>
>>>
>>>
>>>> + args->size = args->pitch * args->height;
>>>> +
>>>> + ret = hibmc_gem_create(dev, args->size, false,
>>>> + &gobj);
>>>> + if (ret)
>>>> + return ret;
>>>> +
>>>> + ret = drm_gem_handle_create(file, gobj, &handle);
>>>> + drm_gem_object_unreference_unlocked(gobj);
>>>> + if (ret)
>>>
>>>
>>> Print error here
>>
>>
>> agreed.
>>
>>
>>>
>>>> + return ret;
>>>> +
>>>> + args->handle = handle;
>>>> + return 0;
>>>> +}
>>>> +
>>>> +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;
>>>> +}
>>>> +
>>>> +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;
>>>> +}
>>
>>
>> Regards,
>> Rongrong.
>>
>>>> --
>>>> 1.9.1
>>>>
>>>>
>>>> _______________________________________________
>>>> linux-arm-kernel mailing list
>>>> linux-arm-kernel at lists.infradead.org
>>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>>
>>> _______________________________________________
>>> linuxarm mailing list
>>> linuxarm at huawei.com
>>> http://rnd-openeuler.huawei.com/mailman/listinfo/linuxarm
>>>
>>> .
>>>
>>
>>
>> _______________________________________________
>> linux-arm-kernel mailing list
>> linux-arm-kernel at lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
> .
>
--
Regards, Rongrong
