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/*
* SMedia Glamo 336x/337x memory management
*
* Copyright (c) 2009 Thomas White <taw@bitwiz.org.uk>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
#include <drm/drmP.h>
#include <drm/glamo_drm.h>
#include "glamo-drm-private.h"
struct drm_gem_object *glamo_gem_object_alloc(struct drm_device *dev, int size,
int alignment)
{
struct drm_gem_object *obj;
struct glamodrm_handle *gdrm;
struct drm_glamo_gem_object *gobj;
gdrm = dev->dev_private;
size = roundup(size, PAGE_SIZE);
obj = drm_gem_object_alloc(dev, size);
if (obj == NULL) return NULL;
gobj = obj->driver_private;
/* Allocate memory for this object in VRAM */
gobj->block = drm_mm_search_free(gdrm->mmgr, size, alignment, 1);
if (!gobj->block) {
goto fail;
}
gobj->block = drm_mm_get_block(gobj->block, size, alignment);
if (!gobj->block) {
goto fail;
}
return obj;
fail:
mutex_lock(&dev->struct_mutex);
drm_gem_object_unreference(obj);
mutex_unlock(&dev->struct_mutex);
printk(KERN_INFO "[glamo-drm] Failed to allocate object\n");
return NULL;
}
int glamo_ioctl_gem_create(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_glamo_gem_create *args = data;
struct drm_gem_object *obj;
struct drm_glamo_gem_object *gobj;
int handle, ret;
/* Create an object */
obj = glamo_gem_object_alloc(dev, args->size, args->alignment);
if ( obj == NULL ) return -ENOMEM;
/* Create a handle for it */
ret = drm_gem_handle_create(file_priv, obj, &handle);
mutex_lock(&dev->struct_mutex);
drm_gem_object_handle_unreference(obj);
mutex_unlock(&dev->struct_mutex);
if (ret) goto fail;
/* Watchpoint */
gobj = obj->driver_private;
printk(KERN_INFO "[glamo-drm] GEM object %i: %li bytes at 0x%lx\n",
handle, gobj->block->size, gobj->block->start);
/* Return */
args->handle = handle;
return 0;
fail:
mutex_lock(&dev->struct_mutex);
drm_gem_object_unreference(obj);
mutex_unlock(&dev->struct_mutex);
printk(KERN_INFO "[glamo-drm] Failed to allocate object\n");
return ret;
}
int glamo_ioctl_gem_mmap(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_glamo_gem_mmap *args = data;
struct drm_gem_object *obj;
loff_t offset;
unsigned long addr;
obj = drm_gem_object_lookup(dev, file_priv, args->handle);
if (obj == NULL)
return -EBADF;
offset = args->offset;
down_write(¤t->mm->mmap_sem);
addr = do_mmap(obj->filp, 0, args->size,
PROT_READ | PROT_WRITE, MAP_SHARED,
args->offset);
up_write(¤t->mm->mmap_sem);
mutex_lock(&dev->struct_mutex);
drm_gem_object_unreference(obj);
mutex_unlock(&dev->struct_mutex);
if (IS_ERR((void *)addr))
return addr;
args->addr_ptr = (uint64_t) addr;
return 0;
}
int glamo_ioctl_gem_pin(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
printk(KERN_INFO "glamo_ioctl_gem_pin\n");
return 0;
}
int glamo_ioctl_gem_unpin(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
printk(KERN_INFO "glamo_ioctl_gem_unpin\n");
return 0;
}
int glamo_ioctl_gem_pread(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
printk(KERN_INFO "glamo_ioctl_gem_pread\n");
return 0;
}
int glamo_ioctl_gem_pwrite(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
printk(KERN_INFO "glamo_ioctl_gem_pwrite\n");
return 0;
}
int glamodrm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
return VM_FAULT_SIGBUS;
}
int glamodrm_gem_init_object(struct drm_gem_object *obj)
{
struct drm_glamo_gem_object *gobj;
/* Allocate a private structure */
gobj = drm_calloc(1, sizeof(*gobj), DRM_MEM_DRIVER);
if (!gobj) return -ENOMEM;
obj->driver_private = gobj;
gobj->obj = obj;
return 0;
}
void glamodrm_gem_free_object(struct drm_gem_object *obj)
{
struct drm_glamo_gem_object *gobj;
gobj = obj->driver_private;
/* Free the VRAM */
drm_mm_put_block(gobj->block);
/* Free the private structure */
drm_free(obj->driver_private, 1, DRM_MEM_DRIVER);
}
/* Memory management initialisation */
int glamo_buffer_init(struct glamodrm_handle *gdrm)
{
gdrm->mmgr = drm_calloc(1, sizeof(struct drm_mm), DRM_MEM_DRIVER);
drm_mm_init(gdrm->mmgr, 0, gdrm->vram_size);
return 0;
}
/* Memory management finalisation */
int glamo_buffer_final(struct glamodrm_handle *gdrm)
{
drm_mm_takedown(gdrm->mmgr);
drm_free(gdrm->mmgr , 1, DRM_MEM_DRIVER);
return 0;
}
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